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← Human Body & HealthDuring a desert survival scenario, if a hiker restricts water intake to conserve their limited supply, which outcome is most likely related to the hormonal and thirst mechanisms?
A)Increased atrial natriuretic peptide release
B)Decreased aquaporin-2 channel expression
C)Elevated plasma osmolality triggers thirst✓
D)Suppressed renin-angiotensin-aldosterone system
💡 Explanation
As the hiker becomes dehydrated, plasma osmolality increases because of the higher concentration of solutes in the blood. This triggers the release of ADH and the sensation of thirst. Therefore, thirst increases due to the osmolality changes, rather than being suppressed by compensatory mechanisms or directly influencing ANP levels.
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