<prompt> If the plasma concentration of a freely filterable substance is 2 mgmL, GFR is 100 mLmin, urine concentration of the substance is 10 mgmL, and urine flow rate is 5 mLmin, we can conclude that the kidney tubulesReabsorbed 150 mgminReabsorbed 200 mgminSecreted 50 mgminSecreted 150 mgmin  <response>: Reabsorbed 150 mgminThe filtered load of the substance is P x GFR 2 mgmL x 100 mLmin 200 mgmin. The rate of excretion is UxV10 mgmL x5 mLmin 50 mgmin. Hence, more substance X was filtered than was excreted, and the difference, 200 mgmin - 50 mgmin 150 mgmin, gives the rate of tubular reabsorption of substance X.Note : amount or quantity volume x concentrationRef: Ganong - Review of Medical Physiology 23rd Ed Page 888 