In vitro Demonstration of Potassium Excretion by the Toad Bladder 1

Summary

The in vitro studies reported confirm the previous in vivo report of potassium excretion by the toad bladder. Subjecting the toad to a potassium load augments the in vitro excretion of potassium, also confirming this in vivo observation. In addition, the determination of net potassium flux using simultaneously determined bidirectional fluxes of ⁴⁰K and ⁴²K across a single piece of bladder tissue is described.