<prompt> What is implied if a drug has more clearance than the GFR?Drug is reabsorbed in the tubulesDrug is secreted in the tubulesDrug is excreted in bileDrug is neither secreted nor reabsorbed  <response>: The clearance of the substance equals the GFR if there is no net tubular secretion or reabsorption Inulin, exceeds the GFR if there is net tubular secretion PAH, and is less than the GFR if there is net tubular reabsorption Glucose. Ref: Ganong 25th edpage 679 