Question

Given: For urea, the rate of excretion equals to the GFR times the urea concentration in plasma.

(A) If the urea concentration in plasma is 4.5 mmol/l, what GFR (in l/day) would correspond to an excretion rate of 450 mmol/day.

(B) If the urea clearance is 70 ml/min and the GFR is 125 ml/min, what fraction of urea is being reabsorbed.

(answer A and B)

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Animal Physiology and Biochemistry

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