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