A neurotransmitter is released at a synapse. Which of the following occurs last?
A. Neurotransmitter flows rapidly across the synaptic cleft.
B. Neurotransmitter binds with the receptor on the postsynaptic membrane.
C. Calcium ions enter the presynaptic terminal.
D. An action potential is produced in the postsynaptic membrane.
E. Synaptic vesicles release neurotransmitter by exocytosis.
Answer: D
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