Which Is NOT True About the Countercurrent Multiplier System of the Kidney

question 12

Multiple Choice

Which is NOT true about the countercurrent multiplier system of the kidney?

• A) It creates a hyperosmolar medullary interstitium that allows the kidneys to form hypertonic urine.
• B) The descending loop of Henle is permeable to water.
• C) There is active transport of sodium and chloride out of the ascending limb of the loop of Henle.
• D) The ascending loop of Henle is not permeable to water.
• E) The fraction of filtered NaCl reabsorbed from the ascending limb equals the fraction of filtered water reabsorbed from the descending limb.

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