Psychology 103 - Physiological Psychology » Spring 2022 » Chapter 4 Practice Quiz 3
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Question #1
Many neurons contain and release two neurotransmitters. This situation is called
A.
cohabitation.
B.
coexistence.
C.
ionotropism.
D.
metabotropism.
E.
covalence.
Question #2
The process of neurotransmitter release is referred to as
A.
metabolism.
B.
excitation.
C.
synthesis.
D.
expulsion.
E.
exocytosis.
Question #3
The release of neurotransmitter molecules from buttons is often triggered by
A.
the release of calcium ions from the buttons.
B.
the sodium-potassium pump.
C.
an efflux of sodium ions.
D.
an influx of calcium ions.
E.
the arrival of an AP at the axon hillock.
Question #4
Once released, neurotransmitter molecules typically produce signals in postsynaptic neurons by
A.
entering postsynaptic neurons.
B.
attaching to vesicles.
C.
binding to presynaptic receptors.
D.
binding to postsynaptic receptors.
E.
binding directly to calcium ions.
Question #5
A ligand of acetylcholine is a substance that
A.
binds to acetylcholine.
B.
degrades acetylcholine.
C.
inhibits acetylcholine.
D.
stimulates acetylcholine's synthesis.
E.
facilitates acetylcholine's release.
Question #6
In comparison to ionotropic receptors, metabotropic receptors
A.
are more prevalent.
B.
produce effects that take longer to develop.
C.
produce effects that are more diffuse.
D.
produce longer lasting effects.
E.
all of these
Question #7
Second messengers can
A.
all of these
B.
induce IPSPs or EPSPs.
C.
bind to DNA to influence protein synthesis.
D.
be synthesized in response to activation of metabotropic receptors.
E.
influence metabolic activities of the cell.
Question #8
Second messengers are formed in the
A.
postsynaptic neuron.
B.
synaptic cleft.
C.
presynaptic neuron.
D.
vesicles.
E.
mitochondria.
Question #9
Autoreceptors are commonly found in
A.
somas.
B.
postsynaptic membranes.
C.
ribosomes.
D.
synaptic vesicles.
E.
presynaptic membranes.
Question #10
Autoreceptors of a neuron are sensitive to the neuron's own
A.
IPSPs.
B.
second messengers.
C.
neurotransmitter.
D.
EPSPs.
E.
APs.
Question #11
Which of the following are thought to play a role in reducing excessive neurotransmitter release?
A.
somatic receptors
B.
dendritic receptors
C.
autoreceptors
D.
dendritic spines
E.
postsynaptic receptors
Question #12
Which of the following is currently thought to be a valid general principle of synaptic transmission?
A.
none of these
B.
All receptors are in postsynaptic membranes.
C.
Each neurotransmitter acts on only one receptor subtype.
D.
All neurotransmitters are released into the synaptic cleft.
E.
Each neuron releases only one neurotransmitter.
Question #13
There is only one neurotransmitter that is known to be deactivated in the synaptic cleft by enzymatic degradation; this neurotransmitter is
A.
norepinephrine.
B.
dopamine.
C.
acetylcholine.
D.
acetylcholinesterase.
E.
glutamate.
Question #14
The one enzyme whose function is to deactivate a specific neurotransmitter once it has been released into the synapse is
A.
acetylcholinesterase.
B.
acetylcholine.
C.
L-dopa.
D.
a G protein.
E.
dopamine.
Question #15
Neurons recycle
A.
all of these
B.
neurotransmitter molecules that have been drawn back into the terminal buttons after being released.
C.
none of these
D.
vesicles that have been integrated into the button membrane during exocytosis.
E.
the breakdown products of neurotransmitter molecules that have been degraded in the synapse by enzymes.
Question #16
Glial cells have been shown to
A.
contain receptors for neurotransmitters.
B.
influence synaptic transmission.
C.
release chemical transmitters.
D.
all of these
E.
conduct signals.
Question #17
Which is considered to be the most prevalent inhibitory neurotransmitter in the mammalian CNS?
A.
glutamate
B.
GABA
C.
serotonin
D.
dopamine
E.
glycine
Question #18
Which of the following is synthesized directly from tyrosine?
A.
GABA
B.
serotonin
C.
epinephrine
D.
L-dopa
E.
dopamine
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