. Animal hormones; a comparative survey. Hormones. 226 METABOLIC HORMONES maintained in frogs, but it is probable that hydrocortisone may act here as in mammals. The removal of such hormones by adrenalectomy in Rana temporaria (but not in R. pipiens) is followed by oedema, or an excessive accumulation of water in the tissues; but the effect of injecting cortical extracts has not yet been shown (Chester Jones, \9Sla),. Intact ia) Intact Isolated skin Fig. 5-20. Increase in rate of water uptake following dehydration or injection of neurohypophysial extract (frog ADH); a. and h. in intact Rana pi
. Animal hormones; a comparative survey. Hormones. 226 METABOLIC HORMONES maintained in frogs, but it is probable that hydrocortisone may act here as in mammals. The removal of such hormones by adrenalectomy in Rana temporaria (but not in R. pipiens) is followed by oedema, or an excessive accumulation of water in the tissues; but the effect of injecting cortical extracts has not yet been shown (Chester Jones, \9Sla),. Intact ia) Intact Isolated skin Fig. 5-20. Increase in rate of water uptake following dehydration or injection of neurohypophysial extract (frog ADH); a. and h. in intact Rana pipiens^ with the cloaca ligatured to prevent loss by excretion; c. in isolated frog's skin (from Sawyer, 1956). Teleostei. Although freshwater teleost fish are in much the same osmotic relation to the environment as Amphibia, the scales usually make the skin more waterproof, and water only enters the tissues through the gut and gills. Diuresis by the kidneys seems therefore to be the main means of water control, and there is some evidence that the cortical cells of the anterior interrenal body (§) may be concerned; but the situation is different in species adapted to different normal environments. In FunduluSy the cortical cells remain inactive when the fish are in sea water,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Jenkin, Penelope M. Oxford, New York, Pergamon Press
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjecthormones
