Biology 1108 Questions with CORRECT Answers

Biology 1108 2 Questions with CORRECT Answers


Question:
During the transduction phase (sensory system), a signal is translated from one
form into another. Which of the following could happen during this
Answer:
A sensory neuron translates a stimulus directly into an electrical signal (an AP)

Question:
stage? Select all that apply.
Answer:
A sensory receptor cell translates a stimulus into a chemical signal (NT) A
sensory neuron translates s chemical signal (a NT produced by a Hint there are 3
possibilisensory receptor cell) into an electrical signal (an action potential)
ties. 1st step of sensory receptor cell process 2nd step of sensory receptor cell
process 3rd step of sensory receptor cell process 4th step of sensory receptor
cell process 1st step of G-protein coupled receptor process 2nd step of G-protein
coupled receptor process 3rd step of G-protein coupled receptor process A stimulus
(light, sound, or a ligand) directly or indirectly causes ion channels embedded in
the cell membrane of the receptor cell to open Ions dittuse in (or out) of the
receptor cell The membrane potential of the receptor cell changes (depolarizes or
hyperpolarizes) The rate of release of neurotransmitter by the receptor cell is
increased or decreased A receptor (R) binds a photon of light or a ligand A
G-protein (G) is activated An ettector (E) is stimulated A second messenger is
released or broken down 4th step of G-protein coupled receptor process 5th step of
G-protein coupled receptor process

Question:
Select all of the true statements about G-protein coupled receptors.
Answer:
A cellular response occurs (ion channels open or close) Both the G-protein and
ettector are embedded in the intracellular side of a cell membrane Hint there are
2.(G-protein) 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:
Chemoreceptor
Answer:
Taste (sweet, umami, bitter) Smell

Question:
Select all of the true statements. (transduction)
Answer:
The transduction step is the translation of a stimulus into an AP (an electrical
signal) that is sent to the CNS/brain. The transduction step sometimes involves a
sensory neuron that translates a stimulus into an AP (an electrical signal) The
transduction step sometimes involves a sensory receptor cell that translates a
stimulus into a chemical signal (a NT), this NT is then translated into an AP (an
electrical signal) by a sensory neuron. 1st step of sensory receptor cell process
when NTs are involved 2nd step of sensory receptor cell process when NTs are
involved 3rd step of sensory receptor cell process when NTs are involved 4th step
of sensory receptor cell process when NTs are involved 5th step of sensory
receptor cell process when NTs are involved 6th step of sensory receptor cell
process when NTs are involved

Question:
Select all of the true statements. (involving sensory neurons and receptors)
Answer:
A stimulus (light, sound, or a chemical ligand) directly or indirectly (e.g.,
G-coupled protein receptor) opens ion channels embedded in the cell membrane of
the receptor cell Positive ions dittuse into the cell The membrane potential of
the receptor cell changes; it depolarizes/gets more positive Voltage gated Ca2+
channels open, Ca2+ ions flow in Neurotransmitters are released by the sensory
receptor cell Neurotransmitters bind to ligand gated channels in the dendrite
region of a sensory neuron. Sensory neurons and sensory receptor cells both have
receptors Receptors are classified based on where they are located (sensory neuron
or sensory receptor cell) Receptors are classified based on their structure/how
they function (they are either ion channel receptors or G-protein coupled
receptors)