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← Human Body & HealthA patient exhibits increased appetite despite normal leptin and insulin levels. Which mechanism is most likely driving this paradoxical hunger response, considering the gut-brain axis and hormone interactions?
A)Increased sympathetic nervous system activation
B)Enhanced nutrient absorption efficiency in jejunum
C)Elevated signaling from melanocortin receptors
D)Ghrelin resistance in hypothalamic neurons✓
💡 Explanation
Ghrelin promotes appetite; resistance to its effects at the hypothalamus can paradoxically lead to increased appetite because the brain fails to recognize normal ghrelin signals, therefore disinhibiting hunger pathways, rather than leptin/insulin deficiency. Other options address alternative satiety mechanisms.
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