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← Nature & AnimalsIn fish gills, which consequence results when blood flow stalls during thermoregulation?
A)Decreased efficiency in oxygen absorption✓
B)Elevated metabolic rate throughout the body
C)Enhanced carbon dioxide extraction rate
D)Diminished water loss across skin
💡 Explanation
Inefficient blood flow disrupts countercurrent exchange; because the oxygen gradient is not maintained, maximal transfer cannot occur. Therefore, oxygen absorption decreases, rather than metabolic rate elevating or water retention improving, due to the thermal constraint disrupting the mechanism.
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