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Science 25 November 1966:
Vol. 154. no. 3752, pp. 1015 - 1017
DOI: 10.1126/science.154.3752.1015
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Articles

Species Specific Effect of Acetylcholine on Bivalve Rectums

M. J. Greenberg 1

1 Department of Zoology, University of Melbourne, Parkville, N2, Victoria, Australia ;Department of Biological Sciences, Florida State University,Tallahassee 32306.

The pharmacology of acetylcholine and 5-hydroxytryptamine on the rectums of Katelysia rhytiphora and K. scalarina was found to be similar, in general, to that of other bivalves. However, while acetylcholine causes a fast twitch in the rectum of K. rhytiphora, the activity and tone of the K. scalarina rectum are depressed except at high concentrations of the drug. The two species can be distinguished by these responses, and, therefore, these rectums are useful experimental objects for studying the physiology of molluscan visceral muscle.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)