The greatest percentage of Na⁺ reabsorption takes place in the
A)proximal tubule
B)loop of Henle
C)distal tubule
D)collecting tubule
E)renal pelvis

Question

Quizplus · Accepted Answer

The proximal tubule is responsible for reabsorbing the majority of filtered sodium ions (Na⁺) in the kidneys, with approximately 65% to 70% of Na⁺ being reabsorbed here. The loop of Henle, distal tubule, and collecting tubule also contribute to Na⁺ reabsorption, but to a lesser extent compared to the proximal tubule. The renal pelvis is not involved in Na⁺ reabsorption.

The Greatest Percentage of Na⁺ Reabsorption Takes Place in the