The descending limb of the loop of Henle is usually in osmotic equilibrium with the interstitial fluid.

Question

Quizplus · Accepted Answer

The descending limb of the loop of Henle is permeable to water, but not to ions, so as water diffuses out of the descending limb into the surrounding interstitial fluid, solutes become more concentrated in the tubular fluid. This creates an osmotic gradient that allows for further concentration of the tubular fluid as it passes through the ascending limb of the loop. Therefore, the descending limb is usually in osmotic equilibrium with the interstitial fluid, as water moves out of the descending limb to balance the concentration gradient.

The Descending Limb of the Loop of Henle Is Usually