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← Nature & AnimalsWhich outcome occurs when fish lamellae experience reduced water flow during opercular pumping?
A)Decreased oxygen absorption efficiency✓
B)Increased carbon dioxide excretion
C)Enhanced ammonia diffusion into water
D)Elevated blood pH from bicarbonate loss
💡 Explanation
When water flow decreases, countercurrent exchange is less effective because the concentration gradient reduces across the gills, diminishing differential pressure, thus causing decreased oxygen absorption. Therefore oxygen absorption declines, differently from other processes which wouldn't rely only this gas equilibrium.
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