In a renal phys question, an explanation had a graph with TF/P for many substances at the end of the proximal tubule. It had inulin having a higher TF/P at the end of the proximal tubule than creatinine. Is this correct? Creatinine is slightly secreted by peritubular capillaries, so wouldn't it have a higher TF/P than inulin at the end of the PT? thanks..