Multiple choice

The amount of renal filterate formed by kidney tubules in a day is about

  1. 1 - 1.5 litres

  2. 50 litres

  3. 75 litres

  4. 160 litres
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The kidneys filter approximately 180 liters of plasma per day to form the renal filtrate (glomerular filtrate). This occurs at a rate of about 125 mL/min. After filtration, approximately 99% of this filtrate is reabsorbed in the renal tubules, leaving only about 1-1.5 liters to be excreted as final urine. The value of 160 liters is a reasonable approximation of this filtration rate.

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