Neurotransmitter in the central and peripheral nervous systems. Acetylcholine is essential to the production of movement through acting at neuromuscular junctions in the peripheral nervous system. It also has a number of functions in the central nervous system, and is thought to be involved in attention, memory, and a variety of other processes. The adjective cholinergic is often used to describe structures and/or activity associated with acetylcholine.

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A chemical that is released from a nerve cell which thereby transmits an impulse from a nerve cell to another nerve, muscle, organ, or other tissue. A neurotransmitter is a messenger of neurologic information from one cell to another.

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