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Tuesday, 4 October 2011

filtration


The rate of water reabsorption from the proximal tubule is determined primarily by the
A. rate of dissolved particle (solute) reabsorption from the proximal tubule
B. concentration of ADH (antidiuretic hormone) in the blood
C. osmotic pressure developed by plasma proteins in the proximal tubule
D. active transport of water molecules by the proximal tubule cells
E. passive filtration due to the high hydrostatic pressure in the proximal tubule

 A. The proximal tubule is very permeable to water, so water reabsorption follows solute (dissolved particle) reabsorption.

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