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← Nature & AnimalsWhich outcome impairs fish gill oxygen absorption when water temperature increases significantly?
A)Reduced hemoglobin oxygen-binding affinity
B)Increased gill membrane diffusion distance
C)Decreased lamellae surface area exposure
D)Disrupted countercurrent exchange efficiency✓
💡 Explanation
When water temperature increases, the oxygen solubility decreases, causing a smaller oxygen gradient between the water and fish blood, impacting the countercurrent exchange because this mechanism relies on maintaining a maximum concentration gradient. Therefore countercurrent exchange efficiency disrupts, rather than directly impacting the other listed characteristics without that inefficiency.
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