Antidiuretic responses to osmotic cutaneous stimulation in the toad,Bufo arenarum
- 1 January 1989
- journal article
- research article
- Published by Springer Nature in Journal of Comparative Physiology B
- Vol. 159 (1), 91-95
- https://doi.org/10.1007/bf00692687
Abstract
Osmotic stimulation of the skin of the toadBufo arenarum with isotonic (115 mM) or hypertonic (400 mM) NaCl solutions produced a marked and reversible antidiuresis within 5 min. No changes in plasma osmolarity were detected in the course of this response. Hypophysectomized animals exhibited a lower and delayed antidiuresis when exposed to a hypertonic environment (400 mM NaCl). This antidiuretic response was drastically reduced in normal toads after ten consecutive days of administration of the sympatoplexic guanethidine. The existence of a feed-forward control of urine production initiated by cutaneous osmotic sensors and involving an adrenergic component is proposed.Keywords
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