MEDizzy - If a person has a kidney transport maximum for glucose of

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The Body Fluids & Kidney (II)

If a person has a kidney transport maximum for glucose of 350 mg/min, a GFR of 100 ml/min, a plasma glucose level of 150 mg/dl, a urine flow rate of 2 ml/min, and no detectable glucose in the urine, what would be the approximate rate of glucose reabsorption, assuming normal kidneys?

ExplanationIn this example, the filtered load of glucose is equal to GFR (100 ml/min) × plasma glucose (150 mg/dl), or 150 mg/min. If there is no detectable glucose in the urine, the reabsorption rate is equal to the filtered load of glucose, or 150 mg/min.