Neurotransmitter Release from the Presynaptic Membrane Is Triggered by the

Multiple Choice

Neurotransmitter release from the presynaptic membrane is triggered by the

A) activation of the sodium-potassium pumps.
B) arrival of an EPSP at the axon terminal.
C) influx of calcium ions into the axon terminal.
D) hyperpolarization of the axon membrane.
E) opening of channels within the microtubules.