Which Statement Is NOT True for Urea

Which statement is NOT true for urea?

A) It is a waste product resulting from the breakdown of protein.
B) It is passively reabsorbed at the end of the proximal tubule down a urea concentration gradient created by the osmotic-induced reabsorption of water from the proximal tubule.
C) Recycling between the late portion of the collecting tubule and the long loops of Henle contributes to medullary hypotonicity.

Correct Answer:

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