Question

Which of the statements is correct? A. Water leaves the descending limb of the loop of Henle through active transport. B. NaCl enters the ascending limb of the loop of Henle through diffusion. C. NaCl leaves the descending limb of the loop of Henle through active transport, and water enters the ascending limb of the loop of Henle through osmosis. D. Water enters the descending limb of the loop of Henle through osmosis. E. NaCl leaves the ascending limb of the loop of Henle through active transport.

Answer 1

Answer:

The best answer is "E"

NaCl leaves the ascending limb of the loop of Henle through active transport.

Explanation:

The loop of Henle is a U-shaped portion of the tubule that conducts urine within each nephron. It's principal function is the recovery of water and sodium chloride from the urine.

The ascending limb is impermeable to water. NaCl is pumped from the tubule into the interstitium in the ascending limb by active transport. This active transport enables the kidney to establish an osmotic gradient which enables the permeability of water and urea thereby allowing the kidneys to concentrate the urine.