Question

Assertion :The renal fluid becomes increasingly concentrated when it flows down in the descending limb of Loop of Henle towards the inner medulla but its concentration decreases in the ascending limb when it flows towards the cortex. Reason: The descending limb of the loop of Henle reabsorbs water, the ascending limb is impermeable to water but salts are reabsorbed.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

The renal fluid becomes increasingly concentrated when it flows down in the descending limb of Loop of Henle towards the inner medulla but its concentration decreases in the ascending limb when it flows towards the cortex because The descending limb of the loop of Henle reabsorbs water, the ascending limb is impermeable to water but salts are reabsorbed.

So, the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.