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What (who) is ACH index - definition
WIKIMEDIA DISAMBIGUATION PAGE
Ach; ACH (disambiguation); A.C.H.
![Components and connections of the [[parasympathetic nervous system]].](https://commons.wikimedia.org/wiki/Special:FilePath/1503 Connections of the Parasympathetic Nervous System.jpg?width=200 "Components and connections of the [[parasympathetic nervous system]].")
![Acetylcholine processing in a synapse. After release acetylcholine is broken down by the enzyme [[acetylcholinesterase]].](https://commons.wikimedia.org/wiki/Special:FilePath/Cholinergic synapse.svg?width=200 "Acetylcholine processing in a synapse. After release acetylcholine is broken down by the enzyme [[acetylcholinesterase]].")
![LFB-HE stain]].](https://commons.wikimedia.org/wiki/Special:FilePath/Nucleus basalis of Meynert - intermed mag.jpg?width=200 "LFB-HE stain]].")
![Muscles contract when they receive signals from motor neurons. The neuromuscular junction is the site of the signal exchange. The steps of this process in vertebrates occur as follows: (1) The action potential reaches the axon terminal. (2) Calcium ions flow into the axon terminal. (3) Acetylcholine is released into the [[synaptic cleft]]. (4) Acetylcholine binds to postsynaptic receptors. (5) This binding causes ion channels to open and allows sodium ions to flow into the muscle cell. (6) The flow of sodium ions across the membrane into the muscle cell generates an action potential which induces muscle contraction. Labels: A: Motor neuron axon B: Axon terminal C: Synaptic cleft D: Muscle cell E: Part of a Myofibril](https://commons.wikimedia.org/wiki/Special:FilePath/The Muscle Contraction Process.png?width=200 "Muscles contract when they receive signals from motor neurons. The neuromuscular junction is the site of the signal exchange. The steps of this process in vertebrates occur as follows: (1) The action potential reaches the axon terminal. (2) Calcium ions flow into the axon terminal. (3) Acetylcholine is released into the [[synaptic cleft]]. (4) Acetylcholine binds to postsynaptic receptors. (5) This binding causes ion channels to open and allows sodium ions to flow into the muscle cell. (6) The flow of sodium ions across the membrane into the muscle cell generates an action potential which induces muscle contraction. Labels: A: Motor neuron axon B: Axon terminal C: Synaptic cleft D: Muscle cell E: Part of a Myofibril")
ACH
Association for Computers and the Humanities (Reference: org., USA)
