Multiple choice

The glucose is absent in the urine of a healthy man but it has been noted that there is more glucose in the blood entering the kidney than the blood leaving the kidney. This is because

  1. some glucose is used up in respiration of kidney cells

  2. some glucose is filtered in other form of waste products

  3. some glucose is converted into glycogen

  4. glucose is absorbed in the urinary bladder
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A Correct answer
Explanation

Glucose is filtered into the kidney tubules but is normally reabsorbed into the blood. The difference in concentration between blood entering and leaving the kidney is primarily due to the metabolic consumption of glucose by kidney cells to power active transport processes.

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