Presynaptic neurons release neurotransmitters by ________.
A)endocytosis
B)exocytosis
C)diffusion
D)active transport

Question

Presynaptic neurons release neurotransmitters by ________.
A)endocytosis
B)exocytosis
C)diffusion
D)active transport

Quizplus · Accepted Answer

Presynaptic neurons release neurotransmitters by exocytosis, which is the process of transporting materials out of a cell by a vesicle fusing with the cell membrane and releasing its contents into the extracellular space. Endocytosis is the opposite process, where materials are taken into the cell by a vesicle forming around them and transporting them inside the cell. Diffusion and active transport are not the mechanisms by which neurotransmitters are released from presynaptic neurons.

Presynaptic Neurons Release Neurotransmitters by ________