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← Nature & AnimalsWhich outcome increases when diadromous fish migrate from freshwater to saltwater environments for spawning?
A)Increased chloride cell activity✓
B)Decreased mucous secretion rate
C)Elevated kidney filtration efficiency
D)Reduced scale mineralization strength
💡 Explanation
When diadromous fish migrate to saltwater, increased osmoregulation through chloride cell activity occurs because hypertonic conditions require them to actively excrete excess salt. Therefore increased chloride cell activity results, rather than decreased mucous, elevated filtration, or reduced mineralization, which respond to different osmotic challenges.
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