Psychology 103 - Physiological Psychology » Spring 2022 » Chapter 4 Practice Quiz 2
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Question #1
Another word for "integration" is
A.
"firing."
B.
"summation."
C.
"all-or-none."
D.
"release."
E.
"activation."
Question #2
Action potentials are produced by the
A.
opening of voltage-activated sodium channels.
B.
closing of ligand-activated chloride channels.
C.
closing of voltage-activated calcium channels.
D.
opening of ligand-activated potassium 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 sodium channels.
B.
opening of potassium channels.
C.
closing of potassium channels.
D.
opening of chloride channels.
E.
closing of chloride channels.
Question #4
The end of the rising phase of an action potential occurs when the
A.
sodium channels open.
B.
potassium channels open.
C.
sodium channels close.
D.
potassium channels close.
Question #5
After a neuron fires, the resting potential is re-established by the
A.
electrostatic gradient.
B.
sodium-potassium pump.
C.
refractory period.
D.
random movement of ions.
E.
EPSPs.
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.
IPSP.
B.
relative refractory period.
C.
threshold of excitation.
D.
absolute refractory period.
E.
threshold of inhibition.
Question #7
The wave of absolute refractoriness that follows an action potential
A.
keeps the action potential from spreading actively back along an axon towards the cell body.
B.
produces saltatory conduction.
C.
produces a second, negative action potential.
D.
increases the speed of axonal transmission.
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.
higher rates over excite the neuron.
C.
the relative refractory period is typically about 1 millisecond.
D.
the total refractory period is typically about 1 millisecond.
E.
the absolute refractory period is typically about 1 millisecond.
Question #9
Active conduction is to passive conduction as
A.
IPSPs are to APs.
B.
excitation is to inhibition.
C.
EPSPs are to APs.
D.
APs are to EPSPs.
E.
EPSPs are to IPSPs.
Question #10
The conduction of an action potential along any axon is mediated by the action of
A.
ligand-activated ion channels.
B.
myelin.
C.
EPSPs.
D.
voltage-activated ion channels.
E.
nodes of Ranvier.
Question #11
Action potentials can be conducted
A.
all of these
B.
passively.
C.
actively.
D.
antidromically.
E.
orthodromically.
Question #12
In large myelinated human motor neurons, impulses travel at about
A.
1 meter per second.
B.
60 meters per second.
C.
the speed of light.
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.
exist.
D.
produce inhibition.
E.
exist in mammals.
Question #14
Axodendritic synapses
A.
often terminate on the axon hillock.
B.
always terminate on dendrites.
C.
are rare.
D.
sometimes terminate on cell bodies.
Question #15
Neurotransmitters are often stored in
A.
synaptic vesicles.
B.
aluminum foil.
C.
the synaptic cleft.
D.
ribosomes.
E.
nodes of Ranvier.
Question #16
Neurotransmitter molecules are often packaged in vesicles by
A.
peptides.
B.
buttons.
C.
Golgi complexes.
D.
microtubules.
E.
ribosomes.
Question #17
Neuropeptides are synthesized in the cell body on
A.
mitochondria.
B.
vesicles.
C.
microtubules.
D.
the Golgi complex.
E.
ribosomes.
Question #18
Peptide neurotransmitters (i.e., neuropeptides) are synthesized in the cell body and
A.
transported in vesicles along microtubules to the buttons.
B.
released by the Golgi complex into the synapse.
C.
stored in ribosomes with small-molecule neurotransmitters.
D.
transported along the axons to the nodes of Ranvier.
E.
stored in the Golgi complex until they are broken down.
Question #19
Many buttons contain two sizes of vesicles; the larger ones typically contain
A.
small-molecule neurotransmitters.
B.
glutamate.
C.
dopamine.
D.
acetylcholine.
E.
neuropeptides.
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