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单词 Acetyl choline
释义

Acetyl choline

中文百科

乙酰胆碱 Acetylcholine

(重定向自Acetyl choline)
3D球形图
Acetylcholine pathway.
Acetylcholine processing in a synapse. After release acetylcholine is broken down by the enzyme acetylcholinesterase.
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

乙酰胆碱英语:Acetylcholine, ACh,分子式CH3COOCH2CH2N(CH33)为中枢及周边神经系统中常见的神经传导物质,于自主神经系统及体运动神经系统中参与神经传导。乙酰胆碱由轴突末梢发布之后,会穿过突触间隙和突触后神经元或运动终板的细胞膜上之受体做结合。

在体运动神经系统,乙酰胆碱在神经肌肉连接处是控制肌肉的收缩;于副交感神经,乙酰胆碱为节前及节后神经发布的神经传导物质;于交感神经,乙酰胆碱则为节前神经发布的神经传导物质。乙酰胆碱的作用因被乙酰胆碱酯酶(acetylcholinesterase;AChE)分解而中止。乙酰胆碱是自主神经系统(ANS)中许多神经递质中的一个。它同时作用于周边神经系统(PNS)和中枢神经系统(CNS)上,并且是躯体神经系统运动中,使用的唯一的神经递质。乙酰胆碱也是所有自主神经节的主要神经递质。

英语百科

Acetylcholine 乙酰胆碱

(重定向自Acetyl choline)
Acetylcholine pathway.
Acetylcholine processing in a synapse. After release acetylcholine is broken down by the enzyme acetylcholinesterase.
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
Components and connections of the parasympathetic nervous system.

Acetylcholine is an organic chemical that functions in the brain and body of many types of animals, including humans, as a neurotransmitter—a chemical released by nerve cells to send signals to other cells. Its name is derived from its chemical structure: it is an ester of acetic acid and choline. Parts in the body that use or are affected by acetylcholine are referred to as cholinergic. Substances that interfere with acetylcholine activity are called anticholinergics.

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更新时间:2025/8/5 13:44:49