If a patient presents with severe dehydration following prolonged exertion, which consequence related to the renin-angiotensin-aldosterone system (RAAS) and antidiuretic hormone (ADH) is most likely?

💡 Explanation

Increased plasma osmolality triggers the release of ADH, because dehydration concentrates solutes in the blood. ADH increases water reabsorption in the kidneys, therefore correcting fluid balance; rather than decreasing reabsorption, it actively conserves water to combat dehydration.

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