Kidney Reabsorption Percentages

Steps:

• Water reabsorption: (150 dm³ entering - 1.5 dm³ urine) / 150 dm³ × 100% = 99%.
• Urea reabsorption: (50 g entering - 30 g urine) / 50 g × 100% = 40%.
• Glucose: Normally fully reabsorbed in kidneys, so 100% (0 g in urine, though not listed).

Why A is correct:

• Matches formula for reabsorption % = [(entering - excreted) / entering] × 100%, with glucose at 100% per renal physiology.

Why the others are wrong:

• B: Water miscalculated as 98.5%; glucose 150% impossible (exceeds 100%).
• C: Glucose value (1.50) and units wrong; ignores full reabsorption.
• D: Inverts percentages (e.g., water 1% is urine amount, not reabsorbed).

Final answer: A