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

Question

Quizplus · Accepted Answer

The ascending limb of the loop of Henle actively transports solutes, mainly Na+ and Cl-, out of the filtrate and into the interstitial fluid, creating a concentration gradient that allows for the reabsorption of water in the collecting duct. A) is false because both sodium and chloride ions are reabsorbed in the ascending limb. C) is false because the vasa recta passively diffuses ions out of the interstitial fluid to maintain the concentration gradient, not actively transport them in. D) is false because the osmolality of the filtrate in the descending limb increases as water is reabsorbed. E) is false because water moves out of the descending limb by osmosis, not the ascending limb.

Which of the Following Statements Is True