Which of the following statements is/are true | vedclass

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(C) $I.$ False: Urine is hypotonic when entering the distal convoluted tubule $(DCT)$ because the ascending limb of the loop of Henle is impermeable t

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$II$ and $III$

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(C) $I.$ False: Urine is hypotonic when entering the distal convoluted tubule $(DCT)$ because the ascending limb of the loop of Henle is impermeable to water but permeable to electrolytes,leading to dilution of the filtrate.$II.$ True: As urine moves through the collecting duct,water is reabsorbed due to the hypertonic medullary interstitium,making the urine hypertonic.$III.$ True: In the proximal convoluted tubule $(PCT)$,the filtrate remains isotonic to the blood plasma because water and solutes are reabsorbed in equal proportions.$IV.$ False: Urine becomes more and more hypertonic as it passes through the descending limb of the loop of Henle because water is reabsorbed into the hypertonic medullary interstitium.

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