Antidiuretic responses to osmotic cutaneous stimulation in the toad, Bufo arenarum - A possible adaptive control mechanism for urine production

Mostrar todas las versiones(2)

Osmotic stimulation of the skin of the toad Bufo arenarum with isotonic (115 m M) or hypertonic (400 m M) 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 low...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Petriella, S., Reboreda, J.C., Otero, M., Segura, E.T.
Formato: JOUR
Materias:
Adaptive
Antidiuresis
Control
Reflex
Toad
guanethidine
sodium chloride
animal experiment
antidiuresis
controlled study
male
nonhuman
osmoregulation
osmotic stimulation
skin
Animal
Bufo arenarum
Diuresis
Hypophysectomy
Male
Osmosis
Skin
Skin Physiology
Sodium Chloride
Support, Non-U.S. Gov't
Urine
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01741578_v159_n1_p91_Petriella
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Osmotic stimulation of the skin of the toad Bufo arenarum with isotonic (115 m M) or hypertonic (400 m M) 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 m M 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. © 1989 Springer-Verlag.

Ejemplares similares