MRCS-0950

A 56-year-old man undergoes tests to determine his renal function. His results over a period of 24 hours were: Urine flow rate: 2. 0 ml/min, Urine inulin: 1.0 mg/ml, Plasma inulin: 0.01 mg/ml, Urine urea: 260 mmol/l, Plasma urea: 7 mmol/l. What is the glomerular filtration rate?