Multiple Choice
The microvilli on the luminal surface of each epithelial cell in the proximal tubule wall will:
A) form a brush border that increases absorptive surface area of the entire inner surface of the proximal tubule.
B) form an electrical gradient that drives the diffusion of negative ions from the filtrate into the interstitial fluid.
C) participate in the countercurrent mechanism, which allows the contents to flow in opposite directions.
D) increase the secretory surface area of the entire inner surface of the proximal tubule.
Correct Answer:

Verified
Correct Answer:
Verified
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