Katz U
Comp Biochem Physiol A Comp Physiol. 1986;84(3):505-9. doi: 10.1016/0300-9629(86)90357-9.
Body water (weight) was studied in the euryhaline toad Bufo viridis during high salt (500 mOsm NaCl) acclimation. Plasma osmolality was greatly increased upon salt acclimation mainly by urea, and was always hyperosmotic to the ambient solution. Water content was regulated quite efficiently in slowly acclimated undisturbed toads. Repeatedly catheterized toads behaved like osmometers when transferred to hyperosmotic solutions. Total urea loss was greatly reduced in salt acclimated toads, suggesting urine was not voided under these conditions. It is concluded that urea accumulation, inhibition of the urine voiding response and the urine in the bladder are the principal factors involved in volume regulation under conditions of salt acclimation.
在广盐性蟾蜍绿蟾蜍适应高盐（500 mOsm NaCl）的过程中，对其体内水分（重量）进行了研究。盐适应后，血浆渗透压大幅升高，主要是由于尿素所致，且始终高于环境溶液的渗透压。在缓慢适应且未受干扰的蟾蜍中，水分含量得到了相当有效的调节。反复插管的蟾蜍在转移至高渗溶液时表现得像渗透压计。盐适应的蟾蜍总尿素损失大幅减少，这表明在这些条件下不会排尿。得出的结论是，尿素积累、排尿反应的抑制以及膀胱中的尿液是盐适应条件下参与体积调节的主要因素。
