Water Transfer by The Toad Bladder
نویسندگان
چکیده
منابع مشابه
Endogenous prostaglandins and osmotic water flow in the toad bladder.
FLORES, AURA G. A., AND GEOFFREY Mr. G. SHARP. Endogenous prostaglandins and osmotic waterflow in the toad bladder. Am. J. Physiol. 223 (6) : 1392-1397. 1972.-Prostaglandins, at low concentrations, inhibit the osmotic water-flow response to antidiuretic hormone (ADH) and to theophylline in toad bladder. They have no effect upon the response to dibutyryl cyclic AMP. Thus the prustaglandins inhib...
متن کاملStudies on the Movement of Water through the Isolated Toad Bladder and Its Modification by Vasopressin
Measurements of diffusion permeability and of net transfer of water have been made across the isolated urinary bladder of the toad, Bufo marinus, and the effects thereon of mammalian neurohypophyseal hormone have been examined. In the absence of a transmembrane osmotic gradient, vasopressin increases the unidirectional flux of water from a mean of 340 to a mean of 570 microl per cm(2) per hour ...
متن کاملWater, proton, and urea transport in toad bladder endosomes that contain the vasopressin-sensitive water channel
Vasopressin (VP) increases the water permeability of the toad urinary bladder epithelium by inducing the cycling of vesicles containing water channels to and from the apical membrane of granular cells. In this study, we have measured several functional characteristics of the endosomal vesicles that participate in this biological response to hormonal stimulation. The water, proton, and urea perm...
متن کاملActive Sodium Transport by the Isolated Toad Bladder
Studies were made of the active ion transport by the isolated urinary bladder of the European toad, Bufo bufo, and the large American toad, Bufo marinus. The urinary bladder of the toad is a thin membrane consisting of a single layer of mucosal cells supported on a small amount of connective tissue. The bladder exhibits a characteristic transmembrane potential with the serosal surface electrica...
متن کاملSelective inhibition of osmotic water flow by general anesthetics to toad urinary bladder.
Vasopressin increases the permeability of the total urinary bladder, an analogue of the mammalian renal collecting duct, to water and small solutes, especially the amide urea. We have observed that three general anesthetic agents of clinical importance, the gases methoxyflurane and halothane and the ultrashortacting barbiturate methohexital, reversibly inhibit vasopressin-stimulated water flow,...
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ژورنال
عنوان ژورنال: Jurnal Agripet
سال: 2000
ISSN: 2460-4534,1411-4623
DOI: 10.17969/agripet.v1i1.3109