Urea transport across urinary bladder and salt acclimation in toad (Bufo viridis).

@article{Shpun1990UreaTA,
  title={Urea transport across urinary bladder and salt acclimation in toad (Bufo viridis).},
  author={Shlomo Shpun and Uri Katz},
  journal={The American journal of physiology},
  year={1990},
  volume={258 4 Pt 2},
  pages={R883-8}
}
The fluxes of urea across the urinary bladder of the toad Bufo viridis have been studied under conditions of acclimation to tap water or 500 mosM NaCl solution. The [14C]urea fluxes were measured simultaneously with [3H]inulin to test for nonspecific leakage. The fluxes are quite high (Ktrans = 75 x 10(-7) cm/s at 5 mmol/l urea) and are similar in either the mucosal-to-serosal or the opposite direction. "Summer" rates were five to six times higher than the "winter" rates. Antidiuretic hormone… CONTINUE READING