Abstract
The aim of this project was to see whether 5-hydroxytryptamine (5-HT) believed to be present in the skin glands of anuran amphibians can be demonstrated histochemically. The Periodic acid-Schiff technique (P.A.S.) and three histochemical methods known to demonstrate 5-HT in enterochromaffin cells (Pontana's, diazonium and Schmorl's) were applied to the dorsal skin of three species—Xenopus laevis, Rana angolensis and Bufo regularis.
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