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