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← Nature & AnimalsWhich outcome occurs when high metabolic demand affects a fish in oxygen-poor water?
A)Increased lamellar recruitment in gills✓
B)Reduced opercular pumping frequency
C)Decreased blood flow to organs
D)Limited ammonia excretion by gills
💡 Explanation
Increased metabolic demand forces enhanced oxygen uptake driven via lamellar recruitment; blood flow reroutes to maximize countercurrent exchange because fish expand active gill surface area rather than reduce effort, and maintain function to limit buildup rather than decrease functions overall.
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