Which of the following correctly explains how the kidney conserves potassium when dietary potassium is low?
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Correct answer: By reducing distal flow and downregulating K⁺ secretory channels
In potassium depletion, the kidney reduces distal tubular flow and downregulates luminal K⁺ channels in the distal nephron, thereby reducing K⁺ secretion and conserving body potassium.
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