Question

What site in the nephron is impermeable to water and reabsorbs Na, K, and Cl?

1) Loop of Henle
2) Distal convoluted tubule
3) Proximal convoluted tubule
4) Collecting duct

Answer 1

The ascending loop of Henle is the site in the nephron that is impermeable to water and reabsorbs Na+, K+, and Cl− ions, causing the filtrate to become more dilute.

Step-by-step explanation:

The site in the nephron that is impermeable to water and reabsorbs Na+, K+, and Cl− is the ascending loop of Henle. In the thin part of the ascending loop of Henle, Na+ and Cl− ions diffuse into the interstitial fluid, and in the thick part, these ions are actively transported into the interstitial fluid. Because the ascending loop of Henle is impermeable to water, the filtrate becomes more dilute as it travels up the limb.