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← Nature & AnimalsWhich effect occurs in fish gills when the lamellar organization is damaged?
A)Reduced respiratory gas exchange efficiency✓
B)Increased ammonia excretion into water
C)Enhanced buoyancy control mechanism
D)Improved ionoregulation in dilute solution
💡 Explanation
When lamellar are damaged, the countercurrent exchange mechanism is disrupted because the surface area for oxygen and carbon dioxide transfer reduces causing lower efficiency. Therefore, less respiratory gas exchange results, rather than other effects because reduced respiratory efficiency primarily affects gas diffusion, not buoyancy, ionoregulation or nitrogenous waste product excretion.
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