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