Which of the following pertains to the ascending limb of the loop of Henle? A)NaCl passively leaves the tubular fluid down its concentration gradient. B)NaCl is actively transported into the interstitial fluid, leaving water behind because the tubular cells are not permeable to water. C) K⁺ is secreted. D) Aldosterone stimulates Na⁺ reabsorption.

Question

Quizplus · Accepted Answer

The ascending limb of the loop of Henle actively transports NaCl from the tubular fluid into the surrounding interstitial fluid. This is because the cells of the ascending limb are impermeable to water, so water is unable to follow the NaCl out of the tubular fluid. This creates a concentration gradient that allows for the reabsorption of more water in the descending limb. Options A, C, and D are not correct statements about the ascending limb of the loop of Henle.

Which of the Following Pertains to the Ascending Limb of the Loop