A key event for the release of neurotransmitter from the presynaptic membrane is the
A) hyperpolarization of the axon membrane.
B) arrival of an action potential at the axon terminal.
C) influx of potassium ions into the axon terminal.
D) activation of the sodium-potassium pumps.
E) opening of ion channels within the microtubules.
Answer: B
Psychology
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