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Question

Biology Question on excretory system

Which part of the nephrons is impermeable to water?

A

Proximal convoluted tubule

B

Distal convoluted tubule

C

Ascending limb of loop of Henle

D

Descending limb of loop of Henle

Answer

Ascending limb of loop of Henle

Explanation

Solution

Ascending limb of loop of Henle is impermeable to water. It does not reabsorb water, rather sodium, potassium, magnesium and chloride are reabsorbed and therefore the filtrate becomes hypotonic to blood plasma.