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NEETZoology-Excretory System

NEET Zoology Nephron Function Assertion Reason Question

Type: Assertion Reason-conceptual-Hard

Assertion (A): In the descending limb of Henle's loop, the filtrate becomes hypertonic, while in ascending limb of Henle's loop, the filtrate becomes hypotonic.

Reason (R): Descending limb of Henle's loop is impermeable to H₂O while ascending limb of Henle's loop is impermeable to electrolytes. In the light of above statements,

choose the correct option.

A

(A) and (R) both are correct and (R) is correct explanation of (A)

B

(A) and (R) both are correct but (R) is not a correct explanation of (A)

C

(A) is correct but (R) is false

D

Both (A) and (R) are false

Correct Answer

Option D

Detailed Explanation

The descending limb is permeable to water, not impermeable, and the ascending limb is permeable to electrolytes, not impermeable. Thus, both statements are incorrect.

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