Acetylcholine - Definition


Acetylcholine is a neurotransmitter, meaning that the substance transmits information from one neuron to another. It is stored in the vesicles at the end of a first neuron, and is secreted during an electrical impulse in the synapse (space between two neurons). Then, it will bind to the receptor end of a second neuron to propagate this influx before being recaptured by the vesicle it came from. This enables the propagation of a potential action (electrical impulses) in the nervous system. The main effects of acetylcholine include dilation of the arteries, a contraction of the bronchial tubes and gastrointestinal tract, and mucus secretion in the bronchial tubes.
Original article published by Jeff. Translated by Jeff. Latest update on November 5, 2013 at 08:30 AM by Jeff.
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