The Countercurrent Mechanism in the Nephron

question 32

Multiple Choice

The countercurrent mechanism in the nephron

• A)creates a highly concentrated interstitial fluid so that urine can be concentrated by the collecting ducts when they are permeable to water.
• B)is a method to move sodium to control its concentration.
• C)keeps the volume of water lost in the urine relatively constant.
• D)keeps interstitial fluid hydrated to maintain blood pressure.

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