The Effect of Varying O 2 Tensions on Na Transport in the Toad Bladder 1

Abstract

Summary

We have studied the effect of changes in the oxygen tension of incubating media on Na transport in the toad bladder. Solutions containing 10% oxygen will support approximately 80% of the aerobic short-circuit current obtained with 100% O₂. When the oxygen tension is reduced below 10%, the SCC falls sharply. The toad bladder will survive exposure to 100% N₂ for periods of at least 90 minutes with little loss of its ability to transport Na.