Question

Which part of the nephron is impermeable to salts?

• A. DCT
• B. PCT
• C. Ascending limb of loop of Henle
• D. Descending limb of loop of Henle

Answer 1

The correct option is D

Descending limb of loop of Henle

The correct option is D.

Explanation of correct option:

Option D

1. It is the first segment of the loop of Henle.
2. It is highly permeable to water and impermeable to salts.
3. The concentration of urine increases in descending portion.

Explanation of incorrect option:

Option A

DCT has an important role in the absorption of ions and water reabsorption.

Option B

PCT reabsorbs water and sodium ions.

Option C

Ascending limb reabsorbs sodium chloride.

Final answer: Descending limb of the loop of Henle is impermeable to salts.