While studying for renal test in pathophysiology class, a student helps a peer by reviewing facts about the cells of the proximal tubule. Which of the following functions should they include in this discussion? Select all that apply
A) Aids in reabsorption
B) Location for high-pressure capillary filtration
C) Rich in mitochondria
D) Plays a role in the medullary collecting tubule
E) Supports active transport processes
Ans: A, C, E
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The cells of the proximal tubule have a fine, villous structure that increases the surface area for reabsorption; they also are rich in mitochondria, which support active transport processes. The epithelial layer thins in segments of the loop of Henle and has few mitochondria, indicating minimal metabolic activity and reabsorptive function.
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