unit 7 Exam Questions and Answers
Graded A+
In an axon, the nerve impulses normally travel - Correct answer-away from the cell
body
Which of the following are found only in the central nervous system?
Select one:
a. sensory neurons
b. motor neurons
c. sensory receptors
d. interneurons - Correct answer-interneurons
Which of the following is characterized by a short axon and long dendrites?
Select one:
a. motor neuron
b. interneuron
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,c. synaptic cleft
d. sensory neuron - Correct answer-sensory neuron
A chemical produced by the puffer fish prevents the opening of sodium gates in
neurons but has no effect on chemical synapses. In which location on a sensory
neuron would impulse transmission initially be stopped when this chemical is
injected into the foot?
Select one:
a. Node of Ranvier.
b. Terminal knob of an axon.
c. Cell body.
d. Myelin sheath. - Correct answer-Node of Ranvier.
The shaded structure W allows humans to:
Select one:
a. distinguish between different stimuli.
b. respond quickly to their environment.
c. store ATP needed for nerve transmission.
d. synthesize acetylcholine. - Correct answer-respond quickly to their environment.
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, On the following graph, which letters indicate the areas in which the
sodium/potassium pump is operating?
Select one:
a. V and Z
b. V and W
c. X and Y
d. W and Y - Correct answer-V and Z
In the synapse shown above, the impulse will travel:
Select one:
a. from W to X.
b. in both directions.
c. from W to Z.
d. from Y to W. - Correct answer-from Y to W.
Neurotransmitters may create an action potential when they:
Select one:
a. excite the presynaptic membrane.
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Graded A+
In an axon, the nerve impulses normally travel - Correct answer-away from the cell
body
Which of the following are found only in the central nervous system?
Select one:
a. sensory neurons
b. motor neurons
c. sensory receptors
d. interneurons - Correct answer-interneurons
Which of the following is characterized by a short axon and long dendrites?
Select one:
a. motor neuron
b. interneuron
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,c. synaptic cleft
d. sensory neuron - Correct answer-sensory neuron
A chemical produced by the puffer fish prevents the opening of sodium gates in
neurons but has no effect on chemical synapses. In which location on a sensory
neuron would impulse transmission initially be stopped when this chemical is
injected into the foot?
Select one:
a. Node of Ranvier.
b. Terminal knob of an axon.
c. Cell body.
d. Myelin sheath. - Correct answer-Node of Ranvier.
The shaded structure W allows humans to:
Select one:
a. distinguish between different stimuli.
b. respond quickly to their environment.
c. store ATP needed for nerve transmission.
d. synthesize acetylcholine. - Correct answer-respond quickly to their environment.
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, On the following graph, which letters indicate the areas in which the
sodium/potassium pump is operating?
Select one:
a. V and Z
b. V and W
c. X and Y
d. W and Y - Correct answer-V and Z
In the synapse shown above, the impulse will travel:
Select one:
a. from W to X.
b. in both directions.
c. from W to Z.
d. from Y to W. - Correct answer-from Y to W.
Neurotransmitters may create an action potential when they:
Select one:
a. excite the presynaptic membrane.
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