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The effect of glucocorticoid on the water permeability of the toad bladder



The effect of glucocorticoid on the water permeability of the toad bladder



Pflugers Archiv für die Gesamte Physiologie des Menschen und der Tiere 299(2): 149-157



Using the toad bladder, the effects of steroids on the water, urea and Na permeability of the biological membrane was examined. As glucocorticoid (cortisol) and mineralocorticoid (aldosterone) were administered separately to a bladder made steroid-free by 14 hr. incubation, the effects of these 2 steroids on the permeability were examined independently. Aldosterone did not affect the tritiated water permeability. Cortisol affected both osmotic flow and diffusion permeability. These effects appeared only about 90 min. after addition of cortisol. Added to a bladder without 14 hr. incubation, cortisol did not affect the water permeability. Cortisol did not affect the urea permeability and the short-circuit current of the toad bladder. These results suggest that there are at least 2 barriers in the toad bladder, 1 for water, and the other for urea and Na and suggest that cortisol affects the barrier for water.

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Accession: 023855673

Download citation: RISBibTeXText

PMID: 5247215

DOI: 10.1007/bf00363661


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