The "all-or-nothing" principle means
A) all of the nerve impulses go to the brain.
B) all the potassium ions on one side of the cell membrane move to the other side of the cell membrane.
C) all the sodium ions on one side of the cell membrane move to the other side of the cell membrane.
D) an entire neuron depolarizes to its maximum strength.
Correct Answer:
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Q12: Afferent nerve fibers carry sensations
A) away from
Q13: The part of the CNS that contains
Q14: The period during which a neuron that
Q15: Saltatory conduction occurs when a nerve impulse
A)
Q16: Many neurotransmitters are broken down by
A) enzymes.
B)
Q18: Nerve fibers is another name for
A) axons.
B)
Q19: Nerve cells receive stimuli or impulses through
A)
Q20: In the spinal cord the small gaps
Q21: The part of the CNS that controls
Q22: Many excitatory neurotransmitters usually cause _ influx
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