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A chemical in the body which transmits messages between a neuron and the nearby cells (a neurotransmitter). Its presence will signal muscles to contract. Nerve agents prevent its breakdown, causing muscles (including those in the heart and lungs) to contract uncontrollably. Atropine, the toxin of deadly nightshade and an antidote of nerve agents, prevents cells from detecting acetylcholine, causing muscles to relax uncontrollably at high doses. Its chemical formula is C7H16NO2.
The skeletal formula for acetylcholine.