Given the following data for substance X (GFR = 125 ml/min, T_m = 125 mg/min, at a plasma concentration of 200 mg/100 ml), how much of substance X is filtered, reabsorbed, and excreted? A) 200 mg/min filtered, 125 mg/min reabsorbed, 75 mg/min excreted B) 250 mg/min filtered, 125 mg/min reabsorbed, 125 mg/min excreted C) 125 mg/min filtered, 125 mg/min reabsorbed, 0 mg/min excreted D) 250 mg/min filtered, 200 mg/min reabsorbed, 50 mg/min excreted E) none of these

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Quizplus · Accepted Answer

The filtered load is calculated as GFR (125 ml/min) multiplied by plasma concentration (2 mg/ml), resulting in 250 mg/min. The maximum reabsorption rate (T_m) is 125 mg/min, so 125 mg/min is reabsorbed, leaving 125 mg/min excreted.

Given the Following Data for Substance X (GFR = 125