Final answer:
The normal glomerular filtration rate (GFR) is 125 mL/min. This means that 125 mL of filtrate is produced by the kidneys each minute. The kidneys reabsorb most of this filtrate, resulting in the production of about 1-2 liters of urine per day.
Step-by-step explanation:
The normal glomerular filtration rate (GFR) is 125 mL/min. GFR is the volume of filtrate formed by both kidneys per minute. On average, 125 mL of filtrate is produced in males and 105 mL in females, which results in a volume of about 180 L/day in males and 150 L/day in females. This filtrate is mostly reabsorbed, so only about 1-2 liters of urine are produced per day.