Osmolarity of the fluid in the descending limb of the loop of Henle is greater than the osmolarity of the fluid in the ascending limb of the loop of Henle at any given level in the renal medulla.

Question

Quizplus · Accepted Answer

The descending limb of the loop of Henle is permeable to water but not to solutes, leading to an increase in osmolarity as water exits. The ascending limb is impermeable to water and actively transports solutes out, decreasing osmolarity.

Osmolarity of the Fluid in the Descending Limb of the Loop