If the kidneys filter approximately 180 liters of blood-derived fluid daily, about how much of this fluid is reabsorbed?

• A. Approximately 10% of the fluid is reabsorbed.
• B. Approximately 1% of the fluid is reabsorbed.
• C. Approximately 50% of the fluid is reabsorbed.
• D. Approximately 99% of the fluid is reabsorbed.

Answer: (D)