What Mechanisms Are Responsible for Producing Concentrated Urine

question 188

Multiple Choice

What mechanisms are responsible for producing concentrated urine?

• A) the juxtamedullary nephrons become active.
• B) the counter-current mechanism pulls out much water.
• C) vasopressin causes facultative water reabsorption in distal tubule.
• D) both (a) and (b) above.
• E) all of these answers.

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