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ZoologyNEET 2024Human excretory system and nephron

Excretory Products and their Elimination

Given below are two statements:

Statement I: In the nephron, the descending limb of the loop of Henle is impermeable to water and permeable to electrolytes.

Statement II: The proximal convoluted tubule is lined by simple columnar brush-border epithelium and increases the surface area for reabsorption.

In the light of the above statements, choose the correct answer from the options given below:

  1. A.Both Statement I and Statement II are false✓
  2. B.Statement I is true but Statement II is false
  3. C.Statement I is false but Statement II is true
  4. D.Both Statement I and Statement II are true

Solution

The descending limb of the loop of Henle is permeable to water but nearly impermeable to electrolytes — the reverse of Statement I. The PCT is lined by simple cuboidal brush-border epithelium, not columnar — Statement II is also false.

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