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← Human Body & HealthWhich mechanism causes increased brain ammonia concentration in cirrhosis?
A)Impaired hepatic urea cycle function✓
B)Increased renal ammonia excretion rate
C)Enhanced muscle glutamine buffering
D)Hyperventilation lowering arterial carbon dioxide
💡 Explanation
Hepatic encephalopathy arises from failures in the urea cycle; causing reduced ammonia conversion because the failing liver cannot process protein waste adequately. Therefore, circulating ammonia bypasses hepatic detoxification rather than being excreted with increased renal output or countered by muscular systems.
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