ce30_9934
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Bitter taste commonly uses GPCR type receptors and downstream signaling. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Sour taste is caused by Na+ entering taste cells through ENaC channels. Correct A signaling cascade can amplify a small input into a larger cellular response. Incorrect MCce30_5077
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Correct Odor identity is encoded by patterns of activity across many receptor types. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect Sour tastants are associated with low pH and increased proton concentration. Incorrect MCce30_bae5
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sour tastants are associated with low pH and increased proton concentration. Incorrect Taste transduction ends with synaptic signaling to sensory neurons. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Signal amplification means each signaling step reduces the number of activated molecules. Correct MC3dba_5e94
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Correct In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Incorrect Signal amplification means each signaling step reduces the number of activated molecules. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect MC3dba_c677
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Bitter tastants are detected by the same receptor used for salty taste. Incorrect Taste transduction ends with synaptic signaling to sensory neurons. Correct A single olfactory sensory neuron expresses every odorant receptor type. Incorrect In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect MCce30_598d
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Many bitter compounds are detected through GPCR signaling in taste receptor cells. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Correct Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect Salty taste commonly involves ion movement through channels rather than GPCR signaling. Incorrect MC3dba_3535
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Odor identity is encoded by patterns of activity across many receptor types. Correct Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Incorrect A cascade is less sensitive because it prevents second messenger production. Incorrect Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Incorrect MCce30_0479
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Correct Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Incorrect Salty taste is often detected by direct ion flow across the membrane. Incorrect MC3dba_6275
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Taste transduction bypasses synapses and directly activates the cortex. Incorrect Bitter taste commonly uses GPCR type receptors and downstream signaling. Correct Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Incorrect Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect MC3dba_e99f
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect Sour tastants are detected because they increase pH inside taste receptor cells. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Correct Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect MC3dba_b05f
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Each olfactory sensory neuron expresses many different olfactory receptor genes. Incorrect Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect A cascade is less sensitive because it prevents second messenger production. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Correct Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect MCce30_7f65
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Odor identity is encoded by patterns of activity across many receptor types. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Correct Many bitter compounds are detected through GPCR signaling in taste receptor cells. Incorrect Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Incorrect MC3dba_759b
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Salty taste is often detected by direct ion flow across the membrane. Correct Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Incorrect A cascade is less sensitive because it prevents second messenger production. Incorrect In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Incorrect Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect MCce30_b974
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Correct Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect Many bitter compounds are detected through GPCR signaling in taste receptor cells. Incorrect Sweet taste is often detected by GPCR type receptors on taste cells. Incorrect Odor identity is encoded by patterns of activity across many receptor types. Incorrect MCce30_cbee
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect Odor identity is determined only by odorant concentration, NOT by receptor patterns. Correct Bitter taste commonly uses GPCR type receptors and downstream signaling. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect MCce30_1cda
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Odorant binding can lead to Golf activation and increased cAMP production. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Bitter tastants are detected by the same receptor used for salty taste. Correct A signaling cascade can amplify a small input into a larger cellular response. Incorrect In sour sensing cells, protons (H+) can directly change ion channel activity. Incorrect MCce30_7c19
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect Phosphodiesterase makes cAMP from ATP and starts signaling. Correct MC3dba_6330
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Correct Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect MCce30_77d1
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
A signaling cascade can amplify a small input into a larger cellular response. Incorrect In sour sensing cells, protons (H+) can directly change ion channel activity. Incorrect Odor identity is encoded by patterns of activity across many receptor types. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Correct Sweet taste is often detected by GPCR type receptors on taste cells. Incorrect MC3dba_f90b
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect In mammals, olfactory receptors are ligand gated ion channels that open directly when an odorant binds. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Correct Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect MCce30_5947
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Correct Sweet taste is often detected by GPCR type receptors on taste cells. Incorrect A single olfactory sensory neuron usually expresses one receptor type. Incorrect A signaling cascade can amplify a small input into a larger cellular response. Incorrect MCce30_2aeb
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Correct Odor identity is encoded by patterns of activity across many receptor types. Incorrect Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect MCce30_261c
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Salty taste is often detected by direct ion flow across the membrane. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Correct Many bitter compounds are detected through GPCR signaling in taste receptor cells. Incorrect MCce30_7750
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Incorrect A single olfactory sensory neuron usually expresses one receptor type. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Incorrect Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Correct A signaling cascade can amplify a small input into a larger cellular response. Incorrect MCce30_6822
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Correct Salty taste is often detected by direct ion flow across the membrane. Incorrect In sour sensing cells, protons (H+) can directly change ion channel activity. Incorrect Many odorants activate multiple receptors, producing a combinatorial code. Incorrect MCce30_236f
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect Salty taste commonly involves ion movement through channels rather than GPCR signaling. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Incorrect Sour tastants are detected because they increase pH inside taste receptor cells. Correct Many odorant receptors are GPCRs expressed in olfactory sensory neurons. Incorrect MC3dba_5fe2
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Taste transduction bypasses synapses and directly activates the cortex. Incorrect Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect A single olfactory sensory neuron usually expresses one receptor type. Correct Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect In mammals, olfactory receptors are ligand gated ion channels that open directly when an odorant binds. Incorrect MC3dba_86c2
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Correct Signal amplification means each signaling step reduces the number of activated molecules. Incorrect Bitter tastants are detected by the same receptor used for salty taste. Incorrect MC3dba_a0ba
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect Sour taste is linked to high acidity and elevated H3O+ in foods. Correct In mammals, olfactory receptors are ligand gated ion channels that open directly when an odorant binds. Incorrect Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Incorrect MCce30_f2c2
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Many odorants activate multiple receptors, producing a combinatorial code. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect Sour taste is linked to high acidity and elevated H3O+ in foods. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Correct MC3dba_2795
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Correct Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Incorrect In mammals, olfactory receptors are ligand gated ion channels that open directly when an odorant binds. Incorrect MC3dba_436e
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Signal amplification means each signaling step reduces the number of activated molecules. Incorrect Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Incorrect In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Incorrect Sour taste is linked to high acidity and elevated H3O+ in foods. Correct Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Incorrect MCce30_1166
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Odor identity is encoded by patterns of activity across many receptor types. Incorrect Each olfactory sensory neuron expresses many different olfactory receptor genes. Correct Many bitter compounds are detected through GPCR signaling in taste receptor cells. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Sweet taste is often detected by GPCR type receptors on taste cells. Incorrect MCce30_a079
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Many odorant receptors are GPCRs expressed in olfactory sensory neurons. Incorrect Sour tastants are associated with low pH and increased proton concentration. Incorrect A cascade is less sensitive because it prevents second messenger production. Correct Many bitter compounds are detected through GPCR signaling in taste receptor cells. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect MC3dba_080a
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Incorrect Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Correct A single olfactory sensory neuron expresses every odorant receptor type. Incorrect Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect Taste transduction bypasses synapses and directly activates the cortex. Incorrect MC3dba_5f3d
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sweet taste is often detected by GPCR type receptors on taste cells. Correct Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect Bitter tastants are detected by the same receptor used for salty taste. Incorrect Signal amplification means each signaling step reduces the number of activated molecules. Incorrect Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect MCce30_7a07
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Incorrect Odor identity is encoded by patterns of activity across many receptor types. Incorrect Sour taste is linked to high acidity and elevated H3O+ in foods. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Correct MC3dba_6987
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect Bitter taste commonly uses GPCR type receptors and downstream signaling. Correct Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Incorrect Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Incorrect Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect MC3dba_83a2
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In sour sensing cells, protons (H+) can directly change ion channel activity. Correct Taste transduction bypasses synapses and directly activates the cortex. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Incorrect In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Incorrect MC3dba_85ea
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Taste transduction bypasses synapses and directly activates the cortex. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Correct Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect A single olfactory sensory neuron expresses every odorant receptor type. Incorrect Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Incorrect MCce30_805d
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Salty taste commonly involves ion movement through channels rather than GPCR signaling. Incorrect Sour tastants are detected because they increase pH inside taste receptor cells. Correct Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect MCce30_7c99
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Sour taste is caused by Na+ entering taste cells through ENaC channels. Correct Salty taste is often detected by direct ion flow across the membrane. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect MC3dba_0385
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Incorrect Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Incorrect Each olfactory sensory neuron expresses many different olfactory receptor genes. Incorrect Salty taste commonly involves ion movement through channels rather than GPCR signaling. Correct MCce30_b995
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sweet taste is detected by a voltage gated sodium channel on taste cells. Correct Odorant binding can lead to Golf activation and increased cAMP production. Incorrect A signaling cascade can amplify a small input into a larger cellular response. Incorrect Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect MC3dba_2862
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Olfactory receptors are commonly seven-transmembrane GPCR proteins. Correct In olfaction, ion channels open only after cAMP is converted into cGMP. Incorrect Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Incorrect MCce30_d496
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Correct In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect A signaling cascade can amplify a small input into a larger cellular response. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Incorrect MCce30_7057
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Sweet taste is often detected by GPCR type receptors on taste cells. Incorrect Salty taste is often detected by direct ion flow across the membrane. Incorrect A single olfactory sensory neuron expresses every odorant receptor type. Correct Sour tastants are associated with low pH and increased proton concentration. Incorrect MCce30_7f8f
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Correct In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Incorrect MCce30_3a01
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Taste transduction ends with synaptic signaling to sensory neurons. Incorrect Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Incorrect Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Correct Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect MC3dba_2152
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sour tastants are detected because they increase pH inside taste receptor cells. Incorrect Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Incorrect Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Correct MC3dba_2dfd
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sour tastants are associated with low pH and increased proton concentration. Correct Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect Taste transduction bypasses synapses and directly activates the cortex. Incorrect Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect MC3dba_4cbe
Which one of the following statements is TRUE of chemosensation (smell and taste)?
A cascade is less sensitive because it prevents second messenger production. Incorrect A single olfactory sensory neuron expresses every odorant receptor type. Incorrect Many odorants activate multiple receptors, producing a combinatorial code. Correct Taste transduction bypasses synapses and directly activates the cortex. Incorrect Bitter tastants are detected by the same receptor used for salty taste. Incorrect MCce30_4a81
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sour tastants are detected because they increase pH inside taste receptor cells. Correct Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Incorrect A signaling cascade can amplify a small input into a larger cellular response. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Incorrect MC3dba_421d
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Correct Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Incorrect Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect Signal amplification means each signaling step reduces the number of activated molecules. Incorrect MC3dba_c9c8
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect Bitter tastants are detected by the same receptor used for salty taste. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Correct A single olfactory sensory neuron expresses every odorant receptor type. Incorrect Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect MC3dba_c5bc
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Many odorant receptors are GPCRs expressed in olfactory sensory neurons. Correct Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect Each olfactory sensory neuron expresses many different olfactory receptor genes. Incorrect A cascade is less sensitive because it prevents second messenger production. Incorrect MC3dba_fdbf
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Incorrect Sour tastants are detected because they increase pH inside taste receptor cells. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Correct Bitter tastants are detected by the same receptor used for salty taste. Incorrect MCce30_c2c4
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Many bitter compounds are detected through GPCR signaling in taste receptor cells. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect A cascade is less sensitive because it prevents second messenger production. Correct Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Incorrect Salty taste commonly involves ion movement through channels rather than GPCR signaling. Incorrect MCce30_61d3
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect A cascade is less sensitive because it prevents second messenger production. Correct Salty taste is often detected by direct ion flow across the membrane. Incorrect MCce30_5e33
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
A signaling cascade can amplify a small input into a larger cellular response. Incorrect Many bitter compounds are detected through GPCR signaling in taste receptor cells. Incorrect Taste transduction ends with synaptic signaling to sensory neurons. Incorrect Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Incorrect Each olfactory sensory neuron expresses many different olfactory receptor genes. Correct MCce30_8bf5
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Taste transduction ends with synaptic signaling to sensory neurons. Incorrect Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Correct Many odorant receptors are GPCRs expressed in olfactory sensory neurons. Incorrect MC3dba_06bf
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Correct Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect Each olfactory sensory neuron expresses many different olfactory receptor genes. Incorrect MCce30_e14b
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Taste transduction ends with synaptic signaling to sensory neurons. Incorrect In sour sensing cells, protons (H+) can directly change ion channel activity. Incorrect In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Correct Odor identity is encoded by patterns of activity across many receptor types. Incorrect Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Incorrect MCce30_a858
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Odorant binding can lead to Golf activation and increased cAMP production. Incorrect Sour tastants are associated with low pH and increased proton concentration. Incorrect Salty taste is often detected by direct ion flow across the membrane. Incorrect Sweet taste is often detected by GPCR type receptors on taste cells. Incorrect Odor identity is determined only by odorant concentration, NOT by receptor patterns. Correct MCce30_2560
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Correct Sweet taste is often detected by GPCR type receptors on taste cells. Incorrect Taste transduction ends with synaptic signaling to sensory neurons. Incorrect MCce30_3d7e
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Taste transduction bypasses synapses and directly activates the cortex. Correct In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect Odor identity is encoded by patterns of activity across many receptor types. Incorrect MC3dba_8391
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect Many odorant receptors are GPCRs expressed in olfactory sensory neurons. Correct Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect MC3dba_bdc7
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Signal amplification can occur when one activated receptor leads to many downstream second messengers. Correct Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Incorrect Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Incorrect In mammals, olfactory receptors are ligand gated ion channels that open directly when an odorant binds. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Incorrect MC3dba_2496
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Correct Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect MCce30_906b
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Phosphodiesterase makes cAMP from ATP and starts signaling. Correct Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect MC3dba_d87d
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Odorant binding can lead to Golf activation and increased cAMP production. Correct Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect Sour tastants are detected because they increase pH inside taste receptor cells. Incorrect MCce30_9b38
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Odorant binding can lead to Golf activation and increased cAMP production. Incorrect Many odorants activate multiple receptors, producing a combinatorial code. Incorrect In sour sensing cells, protons (H+) can directly change ion channel activity. Incorrect A cascade is less sensitive because it prevents second messenger production. Correct Sweet taste is often detected by GPCR type receptors on taste cells. Incorrect MCce30_133f
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect A cascade is less sensitive because it prevents second messenger production. Correct Odor identity is encoded by patterns of activity across many receptor types. Incorrect In sour sensing cells, protons (H+) can directly change ion channel activity. Incorrect Salty taste commonly involves ion movement through channels rather than GPCR signaling. Incorrect MC3dba_0845
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect A signaling cascade can amplify a small input into a larger cellular response. Correct Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Incorrect MC3dba_79a6
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Incorrect Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Correct MC3dba_233d
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Correct MC3dba_5597
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Odor identity is encoded by patterns of activity across many receptor types. Correct Taste transduction bypasses synapses and directly activates the cortex. Incorrect Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Incorrect A single olfactory sensory neuron expresses every odorant receptor type. Incorrect MCce30_ba6c
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Correct Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Incorrect Salty taste commonly involves ion movement through channels rather than GPCR signaling. Incorrect Odor identity is encoded by patterns of activity across many receptor types. Incorrect Sour tastants are associated with low pH and increased proton concentration. Incorrect MCce30_60ac
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sour taste is linked to high acidity and elevated H3O+ in foods. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Each olfactory sensory neuron expresses many different olfactory receptor genes. Correct Salty taste commonly involves ion movement through channels rather than GPCR signaling. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Incorrect MC3dba_a7b8
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect Sour tastants are associated with low pH and increased proton concentration. Correct Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Incorrect Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect MC3dba_e35b
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sour tastants are detected because they increase pH inside taste receptor cells. Incorrect Signal amplification means each signaling step reduces the number of activated molecules. Incorrect Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Incorrect Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Incorrect Many odorants activate multiple receptors, producing a combinatorial code. Correct MCce30_2bb4
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Salty taste commonly involves ion movement through channels rather than GPCR signaling. Incorrect A signaling cascade can amplify a small input into a larger cellular response. Incorrect Many odorant receptors are GPCRs expressed in olfactory sensory neurons. Incorrect Taste transduction bypasses synapses and directly activates the cortex. Correct Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect MC3dba_fbed
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect Taste transduction bypasses synapses and directly activates the cortex. Incorrect Many bitter compounds are detected through GPCR signaling in taste receptor cells. Correct Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect MCce30_b0fb
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sour tastants are associated with low pH and increased proton concentration. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Incorrect Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Correct MCce30_702e
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
A signaling cascade can amplify a small input into a larger cellular response. Incorrect Many odorant receptors are GPCRs expressed in olfactory sensory neurons. Incorrect Salty taste is often detected by direct ion flow across the membrane. Incorrect Sweet taste is detected by a voltage gated sodium channel on taste cells. Correct Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect MC3dba_f0a7
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Each olfactory sensory neuron expresses many different olfactory receptor genes. Incorrect Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect Sour tastants are associated with low pH and increased proton concentration. Correct Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect MC3dba_9632
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sweet taste is often detected by GPCR type receptors on taste cells. Correct In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Incorrect Signal amplification means each signaling step reduces the number of activated molecules. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect MC3dba_41ef
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Correct A cascade is less sensitive because it prevents second messenger production. Incorrect MCce30_8b5e
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sour tastants are detected because they increase pH inside taste receptor cells. Correct Sweet taste is often detected by GPCR type receptors on taste cells. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect Salty taste is often detected by direct ion flow across the membrane. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect MC3dba_7213
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Incorrect Taste transduction ends with synaptic signaling to sensory neurons. Correct Each olfactory sensory neuron expresses many different olfactory receptor genes. Incorrect Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect MCce30_aa67
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Incorrect Each odorant activates only one receptor, so smell has a one odor to one receptor code. Correct In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Many odorant receptors are GPCRs expressed in olfactory sensory neurons. Incorrect MCce30_f1f3
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sour tastants are associated with low pH and increased proton concentration. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect Many bitter compounds are detected through GPCR signaling in taste receptor cells. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Correct MC3dba_5828
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Incorrect Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Correct Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect MC3dba_577d
Which one of the following statements is TRUE of chemosensation (smell and taste)?
A single olfactory sensory neuron expresses every odorant receptor type. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Correct Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect Taste transduction bypasses synapses and directly activates the cortex. Incorrect In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Incorrect MC3dba_b162
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Bitter taste commonly uses GPCR type receptors and downstream signaling. Correct In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect MCce30_1b80
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Correct Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect Taste transduction ends with synaptic signaling to sensory neurons. Incorrect Sour tastants are associated with low pH and increased proton concentration. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Incorrect MC3dba_3dbe
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Correct Sour tastants are detected because they increase pH inside taste receptor cells. Incorrect Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Incorrect MCce30_82f8
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Correct A signaling cascade can amplify a small input into a larger cellular response. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect Many bitter compounds are detected through GPCR signaling in taste receptor cells. Incorrect MC3dba_0a72
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect Taste receptor cells can release neurotransmitter onto afferent neurons. Correct Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Incorrect In mammals, olfactory receptors are ligand gated ion channels that open directly when an odorant binds. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect MCce30_a9c6
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Taste transduction ends with synaptic signaling to sensory neurons. Incorrect Odor identity is encoded by patterns of activity across many receptor types. Incorrect Signal amplification means each signaling step reduces the number of activated molecules. Correct In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect Many odorant receptors are GPCRs expressed in olfactory sensory neurons. Incorrect MC3dba_af0a
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sour tastants are detected because they increase pH inside taste receptor cells. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Correct Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Incorrect Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect Signal amplification means each signaling step reduces the number of activated molecules. Incorrect MCce30_4526
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Taste transduction ends with synaptic signaling to sensory neurons. Incorrect Bitter tastants are detected by the same receptor used for salty taste. Correct A signaling cascade can amplify a small input into a larger cellular response. Incorrect MCce30_c66b
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Odor identity is encoded by patterns of activity across many receptor types. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect Sweet taste is detected by a voltage gated sodium channel on taste cells. Correct MCce30_d3ad
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sour tastants are detected because they increase pH inside taste receptor cells. Correct Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Incorrect Salty taste commonly involves ion movement through channels rather than GPCR signaling. Incorrect A single olfactory sensory neuron usually expresses one receptor type. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Incorrect MCce30_5e03
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
In olfaction, ion channels open only after cAMP is converted into cGMP. Correct Salty taste commonly involves ion movement through channels rather than GPCR signaling. Incorrect Many bitter compounds are detected through GPCR signaling in taste receptor cells. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Incorrect MC3dba_dc85
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Incorrect Each olfactory sensory neuron expresses many different olfactory receptor genes. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Correct MC3dba_b332
Which one of the following statements is TRUE of chemosensation (smell and taste)?
A single olfactory sensory neuron expresses every odorant receptor type. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Correct Bitter tastants are detected by the same receptor used for salty taste. Incorrect Signal amplification means each signaling step reduces the number of activated molecules. Incorrect Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect MCce30_d7cd
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect A cascade is less sensitive because it prevents second messenger production. Correct In sour sensing cells, protons (H+) can directly change ion channel activity. Incorrect MC3dba_ab54
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Incorrect Many odorants activate multiple receptors, producing a combinatorial code. Correct Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect Sour tastants are detected because they increase pH inside taste receptor cells. Incorrect Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect MC3dba_7608
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Correct Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Incorrect MC3dba_036e
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect Many odorants activate multiple receptors, producing a combinatorial code. Correct In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect A single olfactory sensory neuron expresses every odorant receptor type. Incorrect MCce30_92e9
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
A single olfactory sensory neuron usually expresses one receptor type. Incorrect Many odorants activate multiple receptors, producing a combinatorial code. Incorrect Salty taste commonly involves ion movement through channels rather than GPCR signaling. Incorrect Phosphodiesterase makes cAMP from ATP and starts signaling. Correct In sour sensing cells, protons (H+) can directly change ion channel activity. Incorrect MC3dba_a2ff
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In olfaction, ion channels open only after cAMP is converted into cGMP. Incorrect Taste receptor cells can release neurotransmitter onto afferent neurons. Correct Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect Each olfactory sensory neuron expresses many different olfactory receptor genes. Incorrect Sour tastants are detected because they increase pH inside taste receptor cells. Incorrect MC3dba_47b3
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect Each olfactory sensory neuron expresses many different olfactory receptor genes. Incorrect Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Correct Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect MC3dba_9172
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Signal amplification can occur when one activated receptor leads to many downstream second messengers. Correct Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect A single olfactory sensory neuron expresses every odorant receptor type. Incorrect Taste transduction bypasses synapses and directly activates the cortex. Incorrect In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect MCce30_69bf
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect A signaling cascade can amplify a small input into a larger cellular response. Incorrect Salty taste commonly involves ion movement through channels rather than GPCR signaling. Incorrect Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Correct MC3dba_ab3e
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Incorrect Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect Salty taste commonly involves ion movement through channels rather than GPCR signaling. Correct Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect MC3dba_0f76
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In olfaction, cAMP can act as a second messenger that gates ion channels. Correct Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect Taste transduction bypasses synapses and directly activates the cortex. Incorrect Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect MC3dba_b5cd
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Correct Sour tastants are detected because they increase pH inside taste receptor cells. Incorrect A single olfactory sensory neuron expresses every odorant receptor type. Incorrect Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect MCce30_91ba
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Many bitter compounds are detected through GPCR signaling in taste receptor cells. Incorrect A single olfactory sensory neuron usually expresses one receptor type. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Incorrect Taste transduction bypasses synapses and directly activates the cortex. Correct Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect MCce30_df3f
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Salty taste is often detected by direct ion flow across the membrane. Incorrect A single olfactory sensory neuron expresses every odorant receptor type. Correct Odor identity is encoded by patterns of activity across many receptor types. Incorrect Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect MCce30_a90b
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Incorrect Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Correct MC3dba_47e7
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect Salty taste is often detected by direct ion flow across the membrane. Correct Sour tastants are detected because they increase pH inside taste receptor cells. Incorrect In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Incorrect Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Incorrect MC3dba_3e41
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect Salty taste is often detected by direct ion flow across the membrane. Correct In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect MCce30_bc66
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sweet taste is detected by a voltage gated sodium channel on taste cells. Correct In sour sensing cells, protons (H+) can directly change ion channel activity. Incorrect Taste transduction ends with synaptic signaling to sensory neurons. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect MC3dba_e45a
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Incorrect Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect Taste transduction ends with synaptic signaling to sensory neurons. Correct Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Incorrect A single olfactory sensory neuron expresses every odorant receptor type. Incorrect MCce30_f562
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Phosphodiesterase makes cAMP from ATP and starts signaling. Correct Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect Odor identity is encoded by patterns of activity across many receptor types. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect MCce30_bdd9
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
A single olfactory sensory neuron usually expresses one receptor type. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Bitter taste commonly uses GPCR type receptors and downstream signaling. Incorrect Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Correct MCce30_dc58
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sweet taste is often detected by GPCR type receptors on taste cells. Incorrect Sour tastants are associated with low pH and increased proton concentration. Incorrect Taste transduction bypasses synapses and directly activates the cortex. Correct Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect MC3dba_81dc
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Incorrect In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Incorrect Sour taste is linked to high acidity and elevated H3O+ in foods. Correct Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect MCce30_50b8
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect Bitter tastants are detected by the same receptor used for salty taste. Correct Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect MC3dba_968b
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Incorrect Odor identity is encoded by patterns of activity across many receptor types. Correct Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect MCce30_fb8e
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
A single olfactory sensory neuron usually expresses one receptor type. Incorrect Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Correct Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Incorrect Sour taste is linked to high acidity and elevated H3O+ in foods. Incorrect Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Incorrect MCce30_033d
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sweet taste is often detected by GPCR type receptors on taste cells. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Correct A signaling cascade can amplify a small input into a larger cellular response. Incorrect Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Incorrect Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect MC3dba_f09d
Which one of the following statements is TRUE of chemosensation (smell and taste)?
cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Correct Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect Each olfactory sensory neuron expresses many different olfactory receptor genes. Incorrect A cascade is less sensitive because it prevents second messenger production. Incorrect Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Incorrect MCce30_ce8f
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Taste transduction ends with synaptic signaling to sensory neurons. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect Each odorant activates only one receptor, so smell has a one odor to one receptor code. Correct Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Incorrect Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Incorrect MC3dba_3a58
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect Signal amplification means each signaling step reduces the number of activated molecules. Incorrect Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect Sour tastants are associated with low pH and increased proton concentration. Correct Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Incorrect MC3dba_b3b3
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect Taste transduction ends with synaptic signaling to sensory neurons. Correct Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect Bitter tastants are detected by the same receptor used for salty taste. Incorrect A single olfactory sensory neuron expresses every odorant receptor type. Incorrect MCce30_ad9e
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Incorrect Many odorants activate multiple receptors, producing a combinatorial code. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Correct cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect MCce30_cc3f
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sour taste is linked to high acidity and elevated H3O+ in foods. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Incorrect Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Incorrect Odor identity is determined only by odorant concentration, NOT by receptor patterns. Correct Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect MCce30_466f
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Incorrect Bitter taste commonly uses GPCR type receptors and downstream signaling. Incorrect Sour taste is linked to high acidity and elevated H3O+ in foods. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Correct MCce30_3e05
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect Phosphodiesterase makes cAMP from ATP and starts signaling. Correct A signaling cascade can amplify a small input into a larger cellular response. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Incorrect MC3dba_1832
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Salty taste commonly involves ion movement through channels rather than GPCR signaling. Correct Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Incorrect MCce30_db15
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Correct Taste transduction ends with synaptic signaling to sensory neurons. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect Bitter taste commonly uses GPCR type receptors and downstream signaling. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect MCce30_ae36
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Odor identity is encoded by patterns of activity across many receptor types. Incorrect A single olfactory sensory neuron expresses every odorant receptor type. Correct In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Many odorant receptors are GPCRs expressed in olfactory sensory neurons. Incorrect MCce30_65b4
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Bitter taste commonly uses GPCR type receptors and downstream signaling. Incorrect Many odorant receptors are GPCRs expressed in olfactory sensory neurons. Incorrect In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Correct Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect Many odorants activate multiple receptors, producing a combinatorial code. Incorrect MC3dba_fba1
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Incorrect Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect Bitter taste commonly uses GPCR type receptors and downstream signaling. Correct MCce30_d19b
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect In sour sensing cells, protons (H+) can directly change ion channel activity. Incorrect Taste transduction bypasses synapses and directly activates the cortex. Correct Many odorants activate multiple receptors, producing a combinatorial code. Incorrect Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Incorrect MC3dba_34b2
Which one of the following statements is TRUE of chemosensation (smell and taste)?
A cascade is less sensitive because it prevents second messenger production. Incorrect Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect Each olfactory sensory neuron expresses many different olfactory receptor genes. Incorrect Many odorants activate multiple receptors, producing a combinatorial code. Correct Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect MCce30_af4a
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Bitter tastants are detected by the same receptor used for salty taste. Correct Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Incorrect MC3dba_51e9
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Incorrect Sour tastants are detected because they increase pH inside taste receptor cells. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Incorrect Taste receptor cells can release neurotransmitter onto afferent neurons. Correct A cascade is less sensitive because it prevents second messenger production. Incorrect MC3dba_a5ae
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Incorrect Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect Bitter tastants are detected by the same receptor used for salty taste. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Correct MC3dba_f90c
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Salty taste is often detected by direct ion flow across the membrane. Correct Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Incorrect Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Incorrect MC3dba_ec30
Which one of the following statements is TRUE of chemosensation (smell and taste)?
A single olfactory sensory neuron expresses every odorant receptor type. Incorrect Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Incorrect Bitter tastants are detected by the same receptor used for salty taste. Incorrect In mammals, olfactory receptors are ligand gated ion channels that open directly when an odorant binds. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Correct MCce30_9d72
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Many bitter compounds are detected through GPCR signaling in taste receptor cells. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect A signaling cascade can amplify a small input into a larger cellular response. Incorrect Odor identity is encoded by patterns of activity across many receptor types. Incorrect In mammals, olfactory receptors are ligand gated ion channels that open directly when an odorant binds. Correct MC3dba_f913
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sweet taste is often detected by GPCR type receptors on taste cells. Correct Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Incorrect Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect MC3dba_f1d2
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect Signal amplification means each signaling step reduces the number of activated molecules. Incorrect In sour sensing cells, protons (H+) can directly change ion channel activity. Correct In olfaction, ion channels open only after cAMP is converted into cGMP. Incorrect Each olfactory sensory neuron expresses many different olfactory receptor genes. Incorrect MCce30_9c26
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Incorrect Salty taste is often detected by direct ion flow across the membrane. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Correct In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect MCce30_9248
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Correct In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Salty taste is often detected by direct ion flow across the membrane. Incorrect A signaling cascade can amplify a small input into a larger cellular response. Incorrect In sour sensing cells, protons (H+) can directly change ion channel activity. Incorrect MC3dba_5108
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect Salty taste is often detected by direct ion flow across the membrane. Correct In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect A single olfactory sensory neuron expresses every odorant receptor type. Incorrect MC3dba_d091
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Correct Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect MCce30_fab4
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
A cascade is less sensitive because it prevents second messenger production. Correct Taste transduction ends with synaptic signaling to sensory neurons. Incorrect Salty taste commonly involves ion movement through channels rather than GPCR signaling. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect MCce30_8131
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Odor identity is encoded by patterns of activity across many receptor types. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Correct cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect MCce30_78dd
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
A signaling cascade can amplify a small input into a larger cellular response. Incorrect Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Correct Salty taste is often detected by direct ion flow across the membrane. Incorrect MC3dba_0150
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Taste transduction bypasses synapses and directly activates the cortex. Incorrect Sour taste is linked to high acidity and elevated H3O+ in foods. Correct Each olfactory sensory neuron expresses many different olfactory receptor genes. Incorrect Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect MC3dba_d427
Which one of the following statements is TRUE of chemosensation (smell and taste)?
A single olfactory sensory neuron expresses every odorant receptor type. Incorrect Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Correct Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Incorrect In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Incorrect MC3dba_5e1f
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Signal amplification means each signaling step reduces the number of activated molecules. Incorrect Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Incorrect Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect Odor identity is encoded by patterns of activity across many receptor types. Correct Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect MCce30_f2f6
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Each odorant activates only one receptor, so smell has a one odor to one receptor code. Correct Salty taste is often detected by direct ion flow across the membrane. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Taste transduction ends with synaptic signaling to sensory neurons. Incorrect MC3dba_a81c
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Taste transduction bypasses synapses and directly activates the cortex. Incorrect Each olfactory sensory neuron expresses many different olfactory receptor genes. Incorrect Salty taste is often detected by direct ion flow across the membrane. Correct Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect MC3dba_6a0d
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In mammals, olfactory receptors are ligand gated ion channels that open directly when an odorant binds. Incorrect Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect A single olfactory sensory neuron expresses every odorant receptor type. Incorrect In sour sensing cells, protons (H+) can directly change ion channel activity. Correct Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect MC3dba_b16a
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Odor identity is encoded by patterns of activity across many receptor types. Correct Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Incorrect Signal amplification means each signaling step reduces the number of activated molecules. Incorrect Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect Sour tastants are detected because they increase pH inside taste receptor cells. Incorrect MC3dba_1a42
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Bitter tastants are detected by the same receptor used for salty taste. Incorrect Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Incorrect Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Incorrect Many odorant receptors are GPCRs expressed in olfactory sensory neurons. Correct A cascade is less sensitive because it prevents second messenger production. Incorrect MC3dba_279d
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect In mammals, olfactory receptors are ligand gated ion channels that open directly when an odorant binds. Incorrect Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect A single olfactory sensory neuron expresses every odorant receptor type. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Correct MCce30_f255
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Correct Taste transduction ends with synaptic signaling to sensory neurons. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect A signaling cascade can amplify a small input into a larger cellular response. Incorrect MC3dba_f686
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect Signal amplification means each signaling step reduces the number of activated molecules. Incorrect Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Correct MC3dba_8b9b
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In mammals, olfactory receptors are ligand gated ion channels that open directly when an odorant binds. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Correct In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect MC3dba_3d8e
Which one of the following statements is TRUE of chemosensation (smell and taste)?
A cascade is less sensitive because it prevents second messenger production. Incorrect Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Correct Olfactory transduction primarily depends on cGMP made by guanylyl cyclase. Incorrect MCce30_c516
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect Many odorant receptors are GPCRs expressed in olfactory sensory neurons. Incorrect Sour taste is linked to high acidity and elevated H3O+ in foods. Incorrect Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Correct MCce30_46d3
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Bitter taste commonly uses GPCR type receptors and downstream signaling. Incorrect Sour taste is caused by Na+ entering taste cells through ENaC channels. Correct Taste transduction ends with synaptic signaling to sensory neurons. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Incorrect MCce30_34b2
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Many odorants activate multiple receptors, producing a combinatorial code. Incorrect Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Correct Salty taste is often detected by direct ion flow across the membrane. Incorrect Taste transduction ends with synaptic signaling to sensory neurons. Incorrect MC3dba_6652
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect Taste transduction bypasses synapses and directly activates the cortex. Incorrect Sour tastants are detected because they increase pH inside taste receptor cells. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Correct MC3dba_5054
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Incorrect Taste transduction bypasses synapses and directly activates the cortex. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Correct MC3dba_a626
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Incorrect Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Correct Signal amplification means each signaling step reduces the number of activated molecules. Incorrect MCce30_85a7
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Incorrect Salty taste commonly involves ion movement through channels rather than GPCR signaling. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect Sweet tastants are detected mainly by direct passage of glucose through a membrane channel. Correct MC3dba_fc3e
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Correct Sour taste is caused by Na+ entering taste cells through ENaC channels. Incorrect Taste transduction bypasses synapses and directly activates the cortex. Incorrect Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect A single olfactory sensory neuron expresses every odorant receptor type. Incorrect MCce30_f168
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Correct Many odorants activate multiple receptors, producing a combinatorial code. Incorrect Olfactory sensory neurons typically express one olfactory receptor gene. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Olfactory receptors are commonly seven-transmembrane GPCR proteins. Incorrect MC3dba_97b9
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Taste transduction bypasses synapses and directly activates the cortex. Incorrect Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Correct Each odorant activates only one receptor, so smell has a one odor to one receptor code. Incorrect Sour tastants are detected because they increase pH inside taste receptor cells. Incorrect Sweet taste is detected by a voltage gated sodium channel on taste cells. Incorrect MC3dba_a4b9
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Sour tastants are detected because they increase pH inside taste receptor cells. Incorrect Bitter taste occurs only when taste cells take up large amounts of Ca2+ from food. Incorrect Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Incorrect Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Correct In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect MCce30_5473
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Cyclic nucleotide phosphodiesterases reduce signaling by hydrolyzing cyclic nucleotides. Incorrect Many odorants activate multiple receptors, producing a combinatorial code. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Correct Sweet taste is often detected by GPCR type receptors on taste cells. Incorrect Bitter taste commonly uses GPCR type receptors and downstream signaling. Incorrect MCce30_31e4
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sweet taste commonly uses a GPCR pathway rather than a simple ion channel pore. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect Sour tastants are associated with low pH and increased proton concentration. Incorrect Each odorant activates only one receptor, so smell has a one odor to one receptor code. Correct MCce30_4ace
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Many odorants activate multiple receptors, producing a combinatorial code. Incorrect Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Correct Sweet taste is often detected by GPCR type receptors on taste cells. Incorrect cAMP can open cyclic nucleotide gated (CNG) ion channels in olfactory neurons. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Incorrect MC3dba_d40c
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect Salty taste depends on GPCR activation of adenylyl cyclase and cAMP. Incorrect Many odorant receptors are GPCRs expressed in olfactory sensory neurons. Correct Taste transduction bypasses synapses and directly activates the cortex. Incorrect Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect MC3dba_0d57
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In mammals, olfactory receptors are ligand gated ion channels that open directly when an odorant binds. Incorrect Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Correct Taste receptor cells do NOT communicate with neurons and act only as passive sensors. Incorrect In olfactory neurons, cAMP closes CNG channels to trigger depolarization. Incorrect MC3dba_25c0
Which one of the following statements is TRUE of chemosensation (smell and taste)?
In olfaction, odorant binding decreases cAMP by directly inhibiting adenylyl cyclase. Incorrect Signal amplification means each signaling step reduces the number of activated molecules. Incorrect Many bitter compounds are detected through GPCR signaling in taste receptor cells. Correct Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Incorrect Odor identity is determined only by odorant concentration, NOT by receptor patterns. Incorrect MCce30_a0d5
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Most odorants are detected by receptor tyrosine kinases in olfactory neurons. Correct Salty taste is often detected by direct ion flow across the membrane. Incorrect Odorant binding can lead to Golf activation and increased cAMP production. Incorrect Sweet taste is often detected by GPCR type receptors on taste cells. Incorrect A single olfactory sensory neuron usually expresses one receptor type. Incorrect MC3dba_7b3f
Which one of the following statements is TRUE of chemosensation (smell and taste)?
Taste transduction bypasses synapses and directly activates the cortex. Incorrect Phosphodiesterase makes cAMP from ATP and starts signaling. Incorrect Salty taste is primarily detected by nuclear hormone receptors in taste cells. Incorrect Bitter tastants are detected by the same receptor used for salty taste. Incorrect Many odorants activate multiple receptors, producing a combinatorial code. Correct MCce30_27af
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Salty taste is primarily detected by nuclear hormone receptors in taste cells. Correct Phosphodiesterase can terminate cyclic nucleotide signals by breaking down cAMP or cGMP. Incorrect In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect Signal amplification can occur when one activated receptor leads to many downstream second messengers. Incorrect Taste receptor cells can release neurotransmitter onto afferent neurons. Incorrect MCce30_06c3
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Sweet taste is often detected by GPCR type receptors on taste cells. Incorrect Many odorant receptors are GPCRs expressed in olfactory sensory neurons. Incorrect Phosphodiesterase increases cyclic nucleotide levels by synthesizing cAMP and cGMP. Correct In olfaction, an odorant can activate a G protein that stimulates adenylyl cyclase. Incorrect In olfaction, cAMP can act as a second messenger that gates ion channels. Incorrect MCce30_0339
Which one of the following statements is FALSE regarding chemosensation (smell and taste)?
Bitter taste commonly uses GPCR type receptors and downstream signaling. Incorrect A single olfactory sensory neuron usually expresses one receptor type. Incorrect Taste transduction ends with synaptic signaling to sensory neurons. Incorrect Many odorants activate multiple receptors, producing a combinatorial code. Incorrect In olfaction, ion channels open only after cAMP is converted into cGMP. Correct