The Loops of Henle Are Considered to Function as a Countercurrent

question 48

Multiple Choice

The loops of Henle are considered to function as a countercurrent multiplier because

• A) ascending and descending limbs have different permeabilities.
• B) the amount of water conserved is related to the length of the loop.
• C) as urine flows in the loop, a concentration gradient is established in the medulla.
• D) as urine flows in the loop, it becomes more concentrated in the nephron.
• E) active transport in the ascending and descending limbs multiplies the concentration gradient.

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