Psychology 103 - Physiological Psychology » Spring 2022 » Chapter 4 Practice Quiz 2
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Question #1
Another word for "integration" is
A.
"release."
B.
"summation."
C.
"all-or-none."
D.
"activation."
E.
"firing."
Question #2
Action potentials are produced by the
A.
opening of ligand-activated potassium channels.
B.
opening of voltage-activated sodium channels.
C.
closing of ligand-activated chloride channels.
D.
closing of voltage-activated calcium channels.
E.
closing of ligand-activated potassium channels.
Question #3
During an action potential, the change in membrane potential associated with the influx of sodium ions triggers the
A.
opening of chloride channels.
B.
opening of sodium channels.
C.
opening of potassium channels.
D.
closing of chloride channels.
E.
closing of potassium channels.
Question #4
The end of the rising phase of an action potential occurs when the
A.
sodium channels close.
B.
potassium channels open.
C.
potassium channels close.
D.
sodium channels open.
Question #5
After a neuron fires, the resting potential is re-established by the
A.
refractory period.
B.
EPSPs.
C.
random movement of ions.
D.
electrostatic gradient.
E.
sodium-potassium pump.
Question #6
The brief period of time immediately after the initiation of an action potential, when it is absolutely impossible to initiate another one in the same neuron, is called the
A.
relative refractory period.
B.
threshold of excitation.
C.
IPSP.
D.
threshold of inhibition.
E.
absolute refractory period.
Question #7
The wave of absolute refractoriness that follows an action potential
A.
produces saltatory conduction.
B.
increases the speed of axonal transmission.
C.
increases the firing rate.
D.
produces a second, negative action potential.
E.
keeps the action potential from spreading actively back along an axon towards the cell body.
Question #8
Neurons do not normally fire more than 1,000 times per second because
A.
higher rates over excite the neuron.
B.
the total refractory period is typically about 1 millisecond.
C.
the relative refractory period is typically about 1 millisecond.
D.
the absolute refractory period is typically about 1 millisecond.
E.
the sodium-potassium pump cannot repolarize the cell in less than 1 millisecond.
Question #9
Active conduction is to passive conduction as
A.
EPSPs are to APs.
B.
APs are to EPSPs.
C.
EPSPs are to IPSPs.
D.
excitation is to inhibition.
E.
IPSPs are to APs.
Question #10
The conduction of an action potential along any axon is mediated by the action of
A.
EPSPs.
B.
nodes of Ranvier.
C.
ligand-activated ion channels.
D.
voltage-activated ion channels.
E.
myelin.
Question #11
Action potentials can be conducted
A.
antidromically.
B.
actively.
C.
all of these
D.
orthodromically.
E.
passively.
Question #12
In large myelinated human motor neurons, impulses travel at about
A.
the speed of light.
B.
100 meters per second.
C.
1 meter per second.
D.
60 meters per second.
E.
186,000 miles per second.
Question #13
Neurons without axons do not
A.
exist.
B.
generate action potentials.
C.
exist in humans.
D.
exist in mammals.
E.
produce inhibition.
Question #14
Axodendritic synapses
A.
always terminate on dendrites.
B.
often terminate on the axon hillock.
C.
sometimes terminate on cell bodies.
D.
are rare.
Question #15
Neurotransmitters are often stored in
A.
ribosomes.
B.
synaptic vesicles.
C.
aluminum foil.
D.
the synaptic cleft.
E.
nodes of Ranvier.
Question #16
Neurotransmitter molecules are often packaged in vesicles by
A.
ribosomes.
B.
buttons.
C.
Golgi complexes.
D.
peptides.
E.
microtubules.
Question #17
Neuropeptides are synthesized in the cell body on
A.
vesicles.
B.
mitochondria.
C.
microtubules.
D.
ribosomes.
E.
the Golgi complex.
Question #18
Peptide neurotransmitters (i.e., neuropeptides) are synthesized in the cell body and
A.
transported along the axons to the nodes of Ranvier.
B.
stored in the Golgi complex until they are broken down.
C.
released by the Golgi complex into the synapse.
D.
transported in vesicles along microtubules to the buttons.
E.
stored in ribosomes with small-molecule neurotransmitters.
Question #19
Many buttons contain two sizes of vesicles; the larger ones typically contain
A.
dopamine.
B.
acetylcholine.
C.
small-molecule neurotransmitters.
D.
neuropeptides.
E.
glutamate.
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