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← Nature & AnimalsWhich risk increases when cartilaginous fish cease swimming?
A)Elevated buoyant force overwhelms muscle tone
B)The operculum ceases rhythmic motion
C)Oxygen extraction rates undergo decline ✓
D)Kidney filtration rate spikes excessively
💡 Explanation
Oxygen extraction declines because ram ventilation, dependent on continuous water flow is no longer forced over gills; therefore, without steady swimming, gills cease to get enough oxygen, rather than the other, osmoregulation possibilities or unusual pressure differentials arising.
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