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A person is undergoing prolonged fasting. His urine will be found to contain abnormal quantities of:

1. fats
2. amino acids
3. glucose
4. ketones

Correct answer: ketones

Solution

In prolonged fasting, glycogen stores are depleted and the body increases fat oxidation. The liver converts fatty acids into ketone bodies, and excess ketones can appear in the urine (ketonuria).

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