kidney physiological measurement free water reabsorption 2020-12-17T17:58:15Z CMO:0003615 In the physiology of the kidney, free water reabsorption is the volume of water reabsorbed by the blood plasma from the kidney per unit time. A free water reabsorption of zero means the kidney is producing urine isotonic with respect to the plasma. Values greater than zero for free water reabsorption imply that the kidney is producing concentrated urine through the excretion of water with a high level of solutes. PMID:23955305 clinical_measurement_ontology kidney water reabsorption nephron water absorption renal water absorption renal water reabsorption slaulede