Mammalian kidney, under restricted water supply can conserve water by over ________ % reabsorption of glomerular filtrate
Correct answer: D. 99.50%
- A. 80.50%
- B. 90.50%
- C. 95.50%
- D. 99.50%
Explanation
The kidneys normally reabsorb about 99% of glomerular filtrate, and under restricted water supply reabsorption can exceed 99.5%, leaving only a small volume as urine. The lower values describe ordinary or incomplete reabsorption and do not represent maximum water conservation; 99.5% is the intended textbook value.
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