Q.

Which part of nephron is impermeable to water but permeable to K+, Cl and Na+ and partially permeable to urea?

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a

PCT

b

DCT

c

Descending limb of loop of Henle

d

Ascending limb of loop of Henle

answer is D.

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Detailed Solution

The ascending limb is impermeable to water but allows transport of electrolytes actively or
passively. Small amounts of urea enter the thin segment of the ascending limb of Henle’s loop.

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Which part of nephron is impermeable to water but permeable to K+, Cl– and Na+ and partially permeable to urea?