Which of the following is true about 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 is impermeable to water, and NaCl is actively transported out of the tubular fluid and into the interstitial fluid, leaving behind water. Choice A is incorrect because NaCl is actively transported, not passively transported. Choice C is a nonsensical answer. Choice D is incorrect because aldosterone does not directly affect the ascending limb of the loop of Henle.

Which of the Following Is True About the Ascending Limb