Why is a small amount of urea retained in the | vedclass

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(A) The kidney matrix,specifically the renal medulla,retains a small amount of urea to maintain the osmolarity of the interstitial fluid. This high os

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To maintain osmolarity

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(A) The kidney matrix,specifically the renal medulla,retains a small amount of urea to maintain the osmolarity of the interstitial fluid. This high osmolarity is essential for the counter-current mechanism,which allows for the concentration of urine. By keeping urea in the medullary interstitium,the kidney facilitates the reabsorption of water from the collecting ducts,thereby conserving water in the body.

Why is a small amount of urea retained in the kidney matrix?

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