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AIIMS2015ZoologyExcretory Products and their Elimination

Which part of the nephrons is impermeable to water?

Options

  1. AProximal convoluted tubule
  2. BDistal convoluted tubule
  3. CAscending limb of loop of Henle
  4. DDescending limb of loop of Henle

Correct answer

C. Ascending limb of loop of Henle

Step-by-step 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.

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