Vesicles fuse with the presynaptic membrane and the release of neurotransmitter into the synapse is called:
A) endocytosis.
B) exocytosis.
C) synaptic transmission.
D) transport.

Question

Quizplus · Accepted Answer

The process described best fits the definition of exocytosis - the fusion of vesicles with the membrane, resulting in the release of their contents (in this case, neurotransmitter) outside the cell. Endocytosis is the opposite process, where materials are brought into the cell by folding in of the plasma membrane. Synaptic transmission refers to the overall process by which information is passed from one neuron to another across the synapse, which includes the release of neurotransmitter but also other steps. Transport is a general term that doesn't specifically apply to this scenario.

Vesicles Fuse with the Presynaptic Membrane and the Release of Neurotransmitter