Which of the following is a major mechanism by which the kidneys regulate extracellular fluid volume and blood pressure via sodium handling?
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Correct answer: Hormonal modulation of sodium and water reabsorption
The kidneys regulate ECF volume and blood pressure by adjusting sodium (and thus water) reabsorption in response to hormones (e.g., aldosterone, ADH, RAAS), thereby modulating volume and osmolarity.
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