Given below are two statements:
Statement I: In the nephron, the descending limb of 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:
- A
Statement I is true but Statement II is false
- B
Statement I is false but Statement II is true
- C
Both Statement I and Statement II are true
- D
Both Statement I and Statement II are false
The descending limb of the loop of Henle is permeable to water but largely impermeable to electrolytes; the ascending limb shows the reverse permeabilities. Statement I has the property reversed, so it is incorrect. The PCT is lined by simple cuboidal brush-bordered epithelium and the microvilli of the brush border greatly increase the absorptive surface area, so Statement II is essentially correct.
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