Biology 1108 Exam 4 Review Questions and
Answers 100% Verified
Question:
During the transduction phase (sensory system), signal is translated from one form into
another. Which of the following could happen during this stage? Select all that apply. Hint
there are 3 possibili- ties.
Answer:
A sensory neuron translates a stimulus directly into an electrical a signal (an AP) A
sensory receptor cell translates a stimulus into a chemical signal (NT) A sensory neuron
translates s chemical signal (a NT produced by a sensory receptor cell) into an electrical
signal (an action potential)
Question:
1st step of sensory recep- tor cell process
Answer:
A stimulus (light, sound, or a ligand) directly or indirectly causes ion channels embedded
in the cell membrane of the receptor cell to open
Question:
2nd step of sensory recep- tor cell process
Answer:
Ions dittuse in (or out) of the receptor cell
,Question:
3rd step of sensory recep- tor cell process
Answer:
The membrane potential of the receptor cell changes (depolarizes or hyperpolarizes)
Question:
4th step of sensory recep- tor cell process
Answer:
The rate of release of neurotransmitter by the receptor cell is in- creased or decreased
Question:
1st step of G-protein cou- pled receptor process
Answer:
A receptor (R) binds a photon of light or a ligand
Question:
2nd step of G-protein cou- pled receptor process
Answer:
A G-protein (G) is activated
Question:
3rd step of G-protein cou- pled receptor process
Answer:
An ettector (E) is stimulated
,Question:
4th step of G-protein cou- pled receptor process
Answer:
A second messenger is released or broken down
Question:
5th step of G-protein cou- pled receptor process
Answer:
A cellular response occurs (ion channels open or close)
Question:
Select all of the true statements about G-pro- tein coupled receptors. Hint there are
2.(G-protein)
Answer:
Both the G-protein and ettector are embedded in the intracellular side of a cell membrane
A G-protein coupled receptor is a transmembrane protein - it has domains on both the
extracellular side and the intracellular side of a cell membrane
Question:
Photoreceptor
Answer:
Light
, Question:
Mechanoreceptor
Answer:
Hearing and Balance
Question:
Chemoreceptor
Answer:
Taste (sweet, umami, bitter) Smell
Question:
Thermoreceptor
Answer:
Temperature
Question:
Using the chart in the pre- class lecture, which of the statements below is false? (general
senses)
Answer:
General senses including touch, pain, and temperature are per- ceived by both G-protein
coupled receptors and ions channel re- ceptors.
Answers 100% Verified
Question:
During the transduction phase (sensory system), signal is translated from one form into
another. Which of the following could happen during this stage? Select all that apply. Hint
there are 3 possibili- ties.
Answer:
A sensory neuron translates a stimulus directly into an electrical a signal (an AP) A
sensory receptor cell translates a stimulus into a chemical signal (NT) A sensory neuron
translates s chemical signal (a NT produced by a sensory receptor cell) into an electrical
signal (an action potential)
Question:
1st step of sensory recep- tor cell process
Answer:
A stimulus (light, sound, or a ligand) directly or indirectly causes ion channels embedded
in the cell membrane of the receptor cell to open
Question:
2nd step of sensory recep- tor cell process
Answer:
Ions dittuse in (or out) of the receptor cell
,Question:
3rd step of sensory recep- tor cell process
Answer:
The membrane potential of the receptor cell changes (depolarizes or hyperpolarizes)
Question:
4th step of sensory recep- tor cell process
Answer:
The rate of release of neurotransmitter by the receptor cell is in- creased or decreased
Question:
1st step of G-protein cou- pled receptor process
Answer:
A receptor (R) binds a photon of light or a ligand
Question:
2nd step of G-protein cou- pled receptor process
Answer:
A G-protein (G) is activated
Question:
3rd step of G-protein cou- pled receptor process
Answer:
An ettector (E) is stimulated
,Question:
4th step of G-protein cou- pled receptor process
Answer:
A second messenger is released or broken down
Question:
5th step of G-protein cou- pled receptor process
Answer:
A cellular response occurs (ion channels open or close)
Question:
Select all of the true statements about G-pro- tein coupled receptors. Hint there are
2.(G-protein)
Answer:
Both the G-protein and ettector are embedded in the intracellular side of a cell membrane
A G-protein coupled receptor is a transmembrane protein - it has domains on both the
extracellular side and the intracellular side of a cell membrane
Question:
Photoreceptor
Answer:
Light
, Question:
Mechanoreceptor
Answer:
Hearing and Balance
Question:
Chemoreceptor
Answer:
Taste (sweet, umami, bitter) Smell
Question:
Thermoreceptor
Answer:
Temperature
Question:
Using the chart in the pre- class lecture, which of the statements below is false? (general
senses)
Answer:
General senses including touch, pain, and temperature are per- ceived by both G-protein
coupled receptors and ions channel re- ceptors.
