Abstract
The neurotransmitter acetylcholine (ACh) is released from the presynaptic nerve terminal in the form of quantal packets. After diffusing through the synaptic cleft, it acts at the postsynaptic receptor. In the presynaptic nerve terminal ACE is stored inside synaptic vesicles which are thought to be the subcellular manifestation of quantal packaging. There is a “choline cycle” at the nerve terminal: ACh released is hydrolysed to form choline and acetate. An active transport system of high affinity supplies the nerve terminal with extracellular choline for renewed synthesis and release of ACh. Particularly for neuromuscular transmission these mechanisms would appear to be satisfactory for maintaining physiological levels of activation of the effector system.
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Zimmermann, H. (1982). Coexistence of adenosine 5′-triphosphate and acetylcholine in the electromotor synapse. In: Cuello, A.C. (eds) Co-Transmission. Palgrave Macmillan, London. https://doi.org/10.1007/978-1-349-06239-3_12
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DOI: https://doi.org/10.1007/978-1-349-06239-3_12
Publisher Name: Palgrave Macmillan, London
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