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Which of the following statements correctly describes the function of the distal convoluted tubule (DCT)?

1. The descending limb of Henle's loop absorbs only water.
2. The proximal convoluted tubule (PCT) reabsorbs water, ions, and organic nutrients.
3. The ascending limb of Henle's loop absorbs only salts.
4. The distal convoluted tubule (DCT) reabsorbs sodium ions and water based on specific conditions.

Correct answer: The distal convoluted tubule (DCT) reabsorbs sodium ions and water based on specific conditions.

Solution

The DCT (Distal Convoluted Tubule) is involved in the conditional reabsorption of sodium ions and water under the influence of hormones like aldosterone and ADH. This makes option D correct.

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