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.
"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 voltage-activated calcium channels.
D.
closing of ligand-activated chloride 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 chloride channels.
D.
opening of chloride channels.
E.
closing of potassium 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.
random movement of ions.
B.
EPSPs.
C.
electrostatic gradient.
D.
sodium-potassium pump.
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.
threshold of inhibition.
B.
absolute refractory period.
C.
threshold of excitation.
D.
relative refractory period.
E.
IPSP.
Question #7
The wave of absolute refractoriness that follows an action potential
A.
produces saltatory conduction.
B.
produces a second, negative action potential.
C.
increases the speed of axonal transmission.
D.
increases the firing rate.
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.
higher rates over excite the neuron.
C.
the sodium-potassium pump cannot repolarize the cell in less than 1 millisecond.
D.
the relative 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 IPSPs.
D.
EPSPs are to APs.
E.
APs are to EPSPs.
Question #10
The conduction of an action potential along any axon is mediated by the action of
A.
myelin.
B.
nodes of Ranvier.
C.
voltage-activated ion channels.
D.
EPSPs.
E.
ligand-activated ion channels.
Question #11
Action potentials can be conducted
A.
orthodromically.
B.
passively.
C.
all of these
D.
antidromically.
E.
actively.
Question #12
In large myelinated human motor neurons, impulses travel at about
A.
1 meter per second.
B.
100 meters per second.
C.
60 meters per second.
D.
186,000 miles per second.
E.
the speed of light.
Question #13
Neurons without axons do not
A.
exist in humans.
B.
produce inhibition.
C.
exist in mammals.
D.
exist.
E.
generate action potentials.
Question #14
Axodendritic synapses
A.
are rare.
B.
always terminate on dendrites.
C.
often terminate on the axon hillock.
D.
sometimes terminate on cell bodies.
Question #15
Neurotransmitters are often stored in
A.
the synaptic cleft.
B.
synaptic vesicles.
C.
aluminum foil.
D.
ribosomes.
E.
nodes of Ranvier.
Question #16
Neurotransmitter molecules are often packaged in vesicles by
A.
microtubules.
B.
buttons.
C.
peptides.
D.
Golgi complexes.
E.
ribosomes.
Question #17
Neuropeptides are synthesized in the cell body on
A.
mitochondria.
B.
microtubules.
C.
the Golgi complex.
D.
vesicles.
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.
transported along the axons to the nodes of Ranvier.
C.
stored in ribosomes with small-molecule neurotransmitters.
D.
stored in the Golgi complex until they are broken down.
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.
acetylcholine.
C.
dopamine.
D.
glutamate.
E.
small-molecule neurotransmitters.
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