Question

the ____________ is the tiny gap between the axon terminal of one neuron and the dendrites or cell body of the next neuron.
terminal button
neurotransmitter
vesicle
synaptic cleft

Explanation:

A synaptic cleft is the tiny gap between the axon terminal of one neuron and the dendrites or cell body of the next neuron. Terminal buttons are at the end of axons and release neurotransmitters. Neurotransmitters are chemical messengers. Vesicles are structures that store neurotransmitters.

Answer:

D. synaptic cleft