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