ANATOMY

Detailed explanation-1: -Neurotransmitters are released from synaptic vesicles in presynaptic neurons in response to neural activity, diffuse across the synaptic cleft, and bind specific receptors in order to bring about changes in postsynaptic neurons.

Detailed explanation-2: -At a chemical synapse, an action potential triggers the presynaptic neuron to release neurotransmitters. These molecules bind to receptors on the postsynaptic cell and make it more or less likely to fire an action potential.

Detailed explanation-3: -The SNAP-25 protein is required for vesicle fusion that releases neurotransmitters, in particular acetylcholine.

Detailed explanation-4: -Neurotransmitter molecules are released from presynaptic terminals along the axon of nerve Cell A, travel through the synaptic cleft and reach the postsynaptic terminal on Cell B’s dendrite.