Absorption of Galactose by Renal Tubules of the Dog

Abstract

Summary

The renal tubules of the dog absorb about 40% of the galactose that appears in the glomerular filtrate; within rather wide limits the fraction that is absorbed is independent of the concentration of plasma galactose and of the degree of concentration of the glomerular filtrate. In contrast to glucose, the renal tubular transfer of galactose is not altered by the administration of thyroxin. It is likely that a transfer mechanism is involved in the tubular absorption of this sugar.