If the plasma concentration of a freely filterable substance is 2 mg/mL, GFR is 100 mL/min, urine concentration of the substance is 10 mg/mL, and urine flow rate is 5 mL/min, we can conclude that the kidney tubules
Reabsorbed 150 mg/min Reabsorbed 200 mg/min Secreted 50 mg/min Secreted 150 mg/min