<prompt> GFR is measured byUreaInulinCreativeHippuric acid  <response>: Inulin is uniquely treated by nephrons in that it is completely filtered at the glomerulus but neither secreted nor reabsorbed by the tubules. This propey of inulin allows the clearance of inulin to be used clinically as a highly accurate measure of glomerular filtration rate GFR -- the rate of plasma from the afferent aeriole that is filtered into Bowman;s capsule measured in mLmin.Ref: Ganong;s review of medical physiology; 24th edition; page no; 679 