A: The final reabsorption of water from urine | vedclass

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Question

(B) The Assertion is correct: The collecting duct allows for the final reabsorption of water,which is regulated by $ADH$ (antidiuretic hormone),leadin

Vedclass · Accepted Answer

Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion.

Vedclass · Answer

(B) The Assertion is correct: The collecting duct allows for the final reabsorption of water,which is regulated by $ADH$ (antidiuretic hormone),leading to the concentration of urine (hyperosmotic urine).The Reason is also correct: The loop of Henle plays a crucial role in the counter-current mechanism,which creates a high osmolarity (sodium gradient) in the medullary interstitium.However,the Reason is not the direct explanation for the Assertion because the reabsorption in the collecting duct is primarily dependent on $ADH$ levels,whereas the loop of Henle provides the osmotic gradient that makes this reabsorption possible.

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