If the tubular fluid/plasma creatinine concentration ratio in the collecting duct is 100, what is the approximate percentage of the filtered water that remains at that point?

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The tubular fluid/plasma creatinine concentration ratio in the collecting duct being 100 indicates that the concentration of creatinine in the tubular fluid is 100 times higher than in the plasma. This suggests that about 99% of the water originally filtered has been reabsorbed, leaving only 1% of the filtered water in the tubular fluid.

If the Tubular Fluid/plasma Creatinine Concentration Ratio in the Collecting