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Acetylcholine

Meaning

Acetylcholine is a foundational and widely distributed neurotransmitter operating within both the central and peripheral nervous systems. This essential molecule serves as the primary chemical messenger at the neuromuscular junction, facilitating all voluntary muscle contraction. Furthermore, acetylcholine is a crucial regulator within the parasympathetic nervous system, influencing vital involuntary functions such as heart rate deceleration and digestive tract motility. Its systemic presence underscores its pivotal role in integrating motor control with autonomic function.