Synaptic Transmission

Quiz
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Biology
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University
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Medium
Standards-aligned
Dr. Clarkson
Used 81+ times
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8 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Electrical synapses involve ___ whereas chemical synapses involve ___.
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is the action of the neurotransmitter at a chemical synapse?
It acts on receptors in the postsynaptic membrane.
It electrically activates the presynaptic neuron
It crosses the postsynaptic membrane and then activates ion channels in the postsynaptic neuron.
It depolarizes the postsynaptic membrane by delivering an electrical charge.
It transfers an action potential from the presynaptic neuron to the postsynaptic neuron.
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which event is the first in the series of events that take place during chemical synaptic transmission?
Neurotransmitter binds to its receptors.
Influx of Ca2+ in the presynaptic terminal.
Voltage-gated Ca2+ channels open.
Neurotransmitter is released into the synaptic cleft.
Synaptic vesicles fuse with the presynaptic membrane.
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
At which point during signal transmission at a chemical synapse is exocytosis occurring?
As neurotransmitter binds to its receptors.
While Ca2+ enters the presynaptic terminal.
As voltage-gated Ca2+ channels are opening.
During neurotransmitter release into the synaptic cleft.
During reuptake, as synaptic vesicles are reformed from the plasma membrane.
Tags
NGSS.HS-PS2-5
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
The figure shows an electron micrograph of a chemical synapse in the cerebral cortex. Which statement about this synapse is accurate?
Inside the postsynaptic neuron are synaptic vesicles, which fuse with the membrane in the postsynaptic density.
Inside the presynaptic neuron are synaptic vesicles, which fuse with the membrane in the active zone.
Inside the presynaptic neuron are synaptic vesicles, which fuse with the membrane in the postsynaptic density.
A gap junction connects the two neurons via connexons that span the pre- and postsynaptic membranes.
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Small-molecule neurotransmitters are _______ for _______.
taken back into the presynaptic terminal; degradation
taken back into the presynaptic terminal; reuse
taken up by the postsynaptic cell; degradation
taken up by the postsynaptic cell; reuse
scattered in the synaptic cleft; reuse
Tags
NGSS.HS-LS2-3
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
If the distribution of EPP amplitudes has peaks at 0.4 mV, 0.8 mV, 1.2 mV, 1.6 mV, and 2.0 mV, what is the most likely amplitude of the MEPP?
0.4 mV
0.8 mV
1.2 mV
1.6 mV
2.0 mV
8.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
How would application of a Ca2+ channel blocker affect the function of a synapse?
It would increase the magnitude of postsynaptic potential.
It would decrease the magnitude of postsynaptic potential.
It would eliminate the postsynaptic potential but have no effect on presynaptic neuron.
It would eliminate the postsynaptic potential and the presynaptic Ca2+ current.
It would eliminate the presynaptic Ca2+ current but have no effect on the postsynaptic potential.
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