Sodium concentration in the urine will be maintained due to the loop of the nephron (loop of Henle) exhibiting
A) an active release of sodium from the descending limb.
B) a passive and active release of sodium from the ascending limb.
C) a passive release of sodium from the descending limb.
D) the release of water from the ascending limb.
E) the active transport of water.

Question

Quizplus · Accepted Answer

The loop of Henle contains a descending limb that is permeable to water and allows for passive reabsorption, and an ascending limb that actively pumps out sodium ions. This creates a concentration gradient in the surrounding kidney tissue, which allows for further reabsorption of sodium in the collecting duct. Therefore, the loop of Henle plays a crucial role in maintaining sodium concentration in the urine.

Sodium Concentration in the Urine Will Be Maintained Due to the Loop