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Biol Bull 110: 306-309. (June 1956)
© 1956 Marine Biological Laboratory
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RELATIVE EFFECTIVENESS OF DEHYDRATION AND NEUROHYPOPHYSIAL EXTRACTS IN ENHANCING WATER ABSORPTION IN TOADS AND FROGS

C. BARKER JØRGENSEN 1 and PER ROSENKILDE 1

1 Laboratory of Zoophysiology, University of Copenhagen, Copenhagen, Denmark

Comparisons have been made between the effect of strong dehydration (20-30 per cent weight loss) and of supramaximal doses of neurohypophysial extracts on the rate of water uptake through the skin of the toad Bufo bufo (L.) and the frog Rana temporaria (L.). Hydropenia increased the permeability to water much more than did injection of the pituitary extracts. Extracts of mammalian and amphibian glands were equally effective. The responses to desiccation and to injection of neurohypophysial extracts were larger during summer than during winter.






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Copyright © 1956 by the Marine Biological Laboratory.