First slide

Urine Formation

Question

Which of the following regions of nephron is impermeable to water?

Easy

A

PCT
B

descending limb of loop of Henle
C

DCT
D

ascending limb of loop of Henle

Solution

The ascending limb is impermeable to water but allows transport of electrolytes actively or passively.
The descending limb of loop of Henle is permeable to water but almost impermeable to electrolytes.
PCT, DCT and collecting duct are also permeable to water.

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