Question

Select the statements which are correct with respect to loop of Henle in a nephron.
1) Ascending limb of loop of Henle is impermeable to electrolytes, but is permeable to water.
2) Descending limb of loop of Henle is permeable to water but is impermeable to electrolytes
3) Both ascending and descending limbs are permeable to water.
4) Reabsorption is minimum in the ascending limb of loop of Henle.

• A. 1 and 2
• B. 1 and 3
• C. 3 and 4
• D. 2 and 4

Answer 1

The correct option is D 2 and 4

Loop of Henle or Henle’s loop is a long U-shaped portion of the tubular part of the nephron.
The ascending limb of loop of henle is impermeable to water, but is permeable to electrolytes.
The descending limb of loop of henle is permeable to water, but is impermeable to electrolytes.
There is minimum reabsorption in the ascending limb of loop of henle.