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Under normal conditions which one is completely reabsorbed in the renal tubule?

1. Urea
2. Uric acid
3. Salts
4. Glucose

Correct answer: Glucose

Solution

Glucose is normally filtered at the glomerulus and then completely reabsorbed in the proximal tubule, so none appears in urine under normal conditions. Urea, uric acid, and salts are not completely reabsorbed because their handling includes partial reabsorption and/or secretion.

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