Gvsu Bms 250 Exam 3 Questions With Correct
Answers
Which part of a neuron contains chemically gated channels?
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a) Dendrites
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b) Axon
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c) Axon hillock
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d) Synaptic bulb - CORRECT ANSWER✔✔-a) Dendrites
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Which of the following cells produce the myelin sheath?
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a) Glial cells
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b) Ependymal cells
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c) Astrocytes
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d) Oligodendrocytes
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e) Satellite cells - CORRECT ANSWER✔✔-d) Oligodendrocytes
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During chemical synapse, which of the following structure(s) best describes the
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steps of synaptic transmission?
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1. Arrival of action potential in the synaptic knob opens voltage gated Ca2+
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channels |
2. Synaptic vesicles fuse with plasma membrane and neurotransmitter is released
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via exocytosis
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3. Ca2+ enter the synaptic knob and binds synaptic vesicles
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, 4. Neurotransmitter diffuses across synaptic cleft and bind receptors on the
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plasma membrane of the postsynaptic neuron
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a) 1, 3, 2, 4
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b) 3, 1, 2, 4
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c) 4, 3, 2,1
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d) 1, 2, 3, 4 - CORRECT ANSWER✔✔-a) 1, 3, 2, 4
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A graded potential begins in the
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a) Transmissive segment
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b) Conductive segment
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c) Receptive segment
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d) Initial segment - CORRECT ANSWER✔✔-c) Receptive segment
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If a neurotoxin blocks the activity of voltage-gated sodium channels, what will
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occur during an action potential?
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a) Sodium will be unable to exit the neuron
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b) The neuron will be unable to depolarize
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c) Potassium will enter the neuron, repolarizing it
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d) The neuron will remain depolarized and unable to repolarize - CORRECT
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ANSWER✔✔-b) The neuron will be unable to depolarize | | | | | | |
If a neurotransmitter from Neuron A causes Neuron B to hyperpolarize, this is an
| | | | | | | | | | | | | |
example of an | | |
a) excitatory postsynaptic potential
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Answers
Which part of a neuron contains chemically gated channels?
| | | | | | | | |
a) Dendrites
| |
b) Axon
| |
c) Axon hillock
| | |
d) Synaptic bulb - CORRECT ANSWER✔✔-a) Dendrites
| | | | | |
Which of the following cells produce the myelin sheath?
| | | | | | | | |
a) Glial cells
| | |
b) Ependymal cells
| | |
c) Astrocytes
| |
d) Oligodendrocytes
| |
e) Satellite cells - CORRECT ANSWER✔✔-d) Oligodendrocytes
| | | | | |
During chemical synapse, which of the following structure(s) best describes the
| | | | | | | | | | |
steps of synaptic transmission?
| | | |
1. Arrival of action potential in the synaptic knob opens voltage gated Ca2+
| | | | | | | | | | | | |
channels |
2. Synaptic vesicles fuse with plasma membrane and neurotransmitter is released
| | | | | | | | | |
via exocytosis
| | |
3. Ca2+ enter the synaptic knob and binds synaptic vesicles
| | | | | | | | | |
, 4. Neurotransmitter diffuses across synaptic cleft and bind receptors on the
| | | | | | | | | | |
plasma membrane of the postsynaptic neuron
| | | | | |
a) 1, 3, 2, 4
| | | | |
b) 3, 1, 2, 4
| | | | |
c) 4, 3, 2,1
| | | |
d) 1, 2, 3, 4 - CORRECT ANSWER✔✔-a) 1, 3, 2, 4
| | | | | | | | | | |
A graded potential begins in the
| | | | | |
a) Transmissive segment
| | |
b) Conductive segment
| | |
c) Receptive segment
| | |
d) Initial segment - CORRECT ANSWER✔✔-c) Receptive segment
| | | | | | |
If a neurotoxin blocks the activity of voltage-gated sodium channels, what will
| | | | | | | | | | | |
occur during an action potential?
| | | | |
a) Sodium will be unable to exit the neuron
| | | | | | | | |
b) The neuron will be unable to depolarize
| | | | | | | |
c) Potassium will enter the neuron, repolarizing it
| | | | | | | |
d) The neuron will remain depolarized and unable to repolarize - CORRECT
| | | | | | | | | | | |
ANSWER✔✔-b) The neuron will be unable to depolarize | | | | | | |
If a neurotransmitter from Neuron A causes Neuron B to hyperpolarize, this is an
| | | | | | | | | | | | | |
example of an | | |
a) excitatory postsynaptic potential
| | | |
