What do some neuroscientists mean when they use the term kiss and run?
A. The presynaptic and postsynaptic membranes actually touch or "kiss."
B. Synaptic vesicles touch or "kiss" each other inside the presynaptic terminal.
C. Neurotransmitter molecules "kiss" receptors, and then return to the synaptic gap.
D. Synaptic vesicles "kiss" the axon terminal membrane, releasing only a part of their contents.
Answer: D
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