Question

Ascending limb of loop of Henle is:

• A. Permeable to both water and electrolytes
• B. Permeable to water but not for electrolytes
• C. Impermeable to water but not for electrolytes
• D. Impermeable to both water and electrolytes

Answer 1

The correct option is C Impermeable to water but not for electrolytes

The ascending limb of the loop of Henle is a direct continuation from the descending limb of loop of Henle, and one of the structures in the nephron of the kidney.

The ascending limb is impermeable to water but allows transport of electrolytes actively or passively.

The descending portion of the loop of Henle is extremely permeable to water and is less permeable to ions, therefore water is easily reabsorbed here and solutes are not readily reabsorbed.