Tracing Substances Through the Kidney Complete the following tracing procedures, using Figure 26.6 (p. 710) and Unit 25 for reference. When you have completed all three parts, answer Check Your Understanding Question 6 (p. 716). Part 1 Plasma Protein Trace a plasma protein from the renal artery to the renal vein. Start: Renal Artery _________________________________________________________ _______________________________________________________ _________________________________________________________ _______________________________________________________ _________________________________________________________ _______________________________________________________ _________________________________________________________ _______________________________________________________ _________________________________________________________ _______________________________________________________ _________________________________________________________ End: Renal Vein Part 2 Water Trace a molecule of water from the renal artery to the renal vein. (Assume molecule of water is reabsorbed at the medullary collecting duct.) Start: Renal Artery _________________________________________________________ _______________________________________________________ _________________________________________________________ _______________________________________________________ _________________________________________________________ _______________________________________________________ _________________________________________________________ _______________________________________________________ _________________________________________________________ _______________________________________________________ _________________________________________________________ _______________________________________________________ _________________________________________________________ _______________________________________________________ _________________________________________________________ _________________