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Human Body & Health

Which risk increases as antidiuretic hormone (ADH) rises in the distal convoluted tubule of a renal nephron?

A)Decreased potassium ion reabsorption
B)Increased urea concentration in medulla
C)Reduced sodium chloride reabsorption
D)Elevated water reabsorption, hyponatremia

💡 Explanation

Increased ADH triggers aquaporin insertion into the collecting duct, thus increasing water reabsorption. Because water is reabsorbed without solutes, this leads to hyponatremia. Therefore, hyponatremia risk increases, rather than causing changes to potassium, urea, or sodium handling directly.

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