Tubular fluid becomes progressively _____________ as it flows down the descending limb of the nephron loop and progressively ___________________ as it flows up the ascending limb.
A) faster moving; slower moving
B) slower moving; faster moving
C) more dilute; more concentrated
D) more concentrated; more dilute
E) none of these answers.

Question

Quizplus · Accepted Answer

As tubular fluid flows down the descending limb of the nephron loop, it becomes more concentrated due to the reabsorption of water. As it flows up the ascending limb, it becomes more dilute because ions are reabsorbed but water is not.

Tubular Fluid Becomes Progressively _____________ as It Flows Down the Descending