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Given below are two statements: one is labeled Assertion (A) and other is labeled Reason (R).
Assertion (A): Unlike juxtamedullary nephrons, cortical nephrons do not play a significant role in the production of concentrated urine.
Reason (R): The cortical nephrons have too short loops of Henle and the vasa recta are absent or highly reduced.
In the light of above statements, choose the correct answer from the options given below.

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Both A and R are false.

Both A and R are true but R doesn’t explain A.

Both A and R are true and R explains A.

A is true but R is false.

answer is A.

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Detailed Solution

As the cortical nephrons have too short loops of Henle and the vasa recta are absent or highly reduced, there is a chance of the production of relatively less concentrated urine by cortical nephrons than to juxtamedullary nephrons.

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