ANATOMY

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 neurotransmitter at neuromuscular junctions, at synapses in the ganglia of the visceral motor system, and at a variety of sites within the central nervous system.

Detailed explanation-3: -Muscle contraction is controlled by receptors in the muscle cell membranes that respond to the neurotransmitter acetylcholine when it is released from motor neurons.

Detailed explanation-4: -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-5: -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).