Statement - A : Counter current mechanism helps in maintaining concentration gradient in medullary interstitium of human kidneys.Statement - B : Descending portion of vasa recta returns NaCl in to medullary interstitium.
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a
A and B are true.
b
A is true, B is false.
c
A is false, B is true.
d
Both statements are false.
answer is B.
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Detailed Solution
NaCl is transported by the ascending limb of Henle’s loop which is exchanged with the descending limb of vasa recta. NaCl is returned to the interstitium by the ascending portion of vasa recta.