When it's time to release a neurotransmitter from a synaptic cleft, the neurotransmitter
A)empties inside the cleft first
B)is released outside the cleft because the vesicle fuses with the cleft
C)is released along with its vesicle outside the cleft
D)All of these are possible outcomes

Question

Quizplus · Accepted Answer

Neurotransmitters are released into the synaptic cleft when the vesicles containing them fuse with the presynaptic membrane at the synaptic cleft, allowing the neurotransmitters to exit the vesicle and enter the cleft. This process is known as exocytosis. The vesicles do not leave the presynaptic neuron but merge with its membrane to release their contents.

When It's Time to Release a Neurotransmitter from a Synaptic