Multiple choice

There is no sugar in urine. The blood entering the kidney has more sugar than leaving the kidney because

  1. sugar is used by kidney cells in metabolism

  2. sugar is absorbed by bladder

  3. sugar is absorbed by proximal convoluted tubule

  4. sugar is absorbed in loop of Henle
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A Correct answer
Explanation

The kidney filters blood and reabsorbs necessary substances. Glucose is normally reabsorbed in the proximal convoluted tubule. The question asks why blood entering has more sugar than leaving; this is because the kidney cells consume glucose for their own metabolic processes.

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