Identify the role played by aquaporin-1 molecules in reabsorption in the proximal tubule.
A) They create an electrochemical gradient for different ions.
B) They increase osmosis across basolateral membrane.
C) They control the diffusion of negatively charged Cl-.
D) They promote passive diffusion of urea into peritubular capillaries.
E) They promote passive paracellular reabsorption of cations.
Correct Answer:
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