where is sodium reabsorption greatest in kidney
Proximal tubule [edit]. Most of the reabsorption (65%) occurs in the proximal tubule. In the latter part it is favoured by an electrochemical driving force, but initially it needs the cotransporter SGLT and the Na-H antiporter.t is very efficient, since more than 25,000 m moles /day of sodium is filtered into the nephron, but only ~100 m moles /day, or less than 0.4% remains in the final urine.