Which of the following statements concerning solute movement in the loop of Henle is true?
A. Na+ and Cl? ions are actively transported into the vasa recta.
B. Only Na+ diffuses from the descending limb.
C. The osmolality of the descending limb decreases as filtrate moves through.
D. Solutes are actively transported from the ascending limb.
E. Water moves by osmosis out of the ascending loop.
Answer: D
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