Which of these statements does NOT refer to 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 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.
D)Only half the filtered amount is eliminated from the plasma.

Question

Quizplus · Accepted Answer

Statement C is incorrect because it describes a process related to the countercurrent mechanism and the role of the loops of Henle in concentrating urine, not specifically about urea. Urea recycling does contribute to the concentration gradient in the medulla but does not directly lead to medullary hypotonicity; instead, it's part of the mechanism that allows the kidney to concentrate urine.

Which of These Statements Does NOT Refer to Urea