NEUROHYPOPHYSIAL HORMONAL CONTROL OF KIDNEY FUNCTION IN THE EUROPEAN EEL (ANGUILLA ANGUILLA L.) ADAPTED TO SEA-WATER OR FRESH WATER

摘要: Low doses of arginine-vasotocin (AVT), isotocin and oxytocin (1 pg-1 ng/kg body weight) were antidiuretic in eels adapted to fresh water but not those sea-water. High (more than 10 ng/kg) always diuretic. No effects on tubular reabsorption observed the glomerular filtration rate (GFR) was proportional maximum reabsorptive for glucose (Tm(glucose)) Increases urinary flow appeared therefore result from recruitment. Infusion AVT or at low rates reduced GFR freshwater levels found seawater eels. Vasopressin (lysine arginine) had no direct effect kidney function blocked both diuretic actions other hormones. When infused into it This could have been due blockade endogenous and/or isotocin.