Effect of salt depletion on sodium concentration in serum and urine of Bufo chilensis. Evidences for increased levels of neurohypophysial principles in their plasma.
Salt-depleted toads Bufo chilensis were compared with animals maintained in NaCl solution and a control group with respect to Na+ content in serum and urine. Plasma hydro-osmotic activity of the animals was measured by increased water transfer across the isolated urinary bladder of the frog (Caudiverbera caudiverbera). Sodium in serum is not affected by pre-adaptation in distilled water. Urine Na+ is markedly reduced. Plasma from depleted animals increases water transfer across the isolated urinary bladder. Immersion in NaCl solution did not have this effect. An increase in neurohypophysial hormones in the blood of the animals is postulated.
D000818:Animals; D001001:Anura / Q000378:metabolism; D002025:Bufonidae / Q000378:metabolism*; D004039:Diet, Sodium-Restricted; D010904:Pituitary Gland, Posterior / Q000502:physiology*; D012964:Sodium / Q000097:blood* / Q000652:urine
D012964:Sodium