GENERAL HISTOLOGY

Detailed explanation-1: -At the presynaptic terminal, acetylcholine storage occurs within the presynaptic vesicle. With the stimulation of the presynaptic terminal, acetylcholine is released from the vesicles and into the synaptic cleft, where the neurotransmitter is free to bind with receptors.

Detailed explanation-2: -Acetylcholine is the chief neurotransmitter of the parasympathetic nervous system, the part of the autonomic nervous system (a branch of the peripheral nervous system) that contracts smooth muscles, dilates blood vessels, increases bodily secretions, and slows heart rate.

Detailed explanation-3: -Acetylcholine (ACh) is is a chemical that plays an important role in many different body functions. It is a neurotransmitter that communicates signals between neurons in the central nervous system (CNS) and the peripheral nervous system (PNS).