Abstract
IT is known that the enzymes needed for the synthesis and the destruction of acetylcholine are present in fish muscle in large amounts1,2, and that certain electric organs, probably derived from muscle, are sensitive to acetylcholine3. It is therefore usually taken for granted that neuromuscular transmission in fish occurs by a cholinergic mechanism, as in other vertebrates, but there is, in fact, little evidence that fish muscle can be activated by acetylcholine, or that acetylcholine is normally released by motor-nerve-endings in fish.
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References
Augustinsson, K. B., Acta Physiol. Scand., 15, Supp. 52 (1948).
Cohen, M., Arch. Biochem. Biophys., 60, 284 (1956).
Keynes, R. D., “Electric Organs”. In The Physiology of Fishes, 2, edit. by Brown, M. E. (Academic Press, New York).
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KRNJEVIĆ, K. Cholinergic Transmission in Fish Muscle. Nature 191, 1403–1404 (1961). https://doi.org/10.1038/1911403a0
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DOI: https://doi.org/10.1038/1911403a0
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