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← Nature & AnimalsWhich osmoregulatory outcome is seen when saltwater fish drink seawater without sufficient chloride cell activity?
A)Increased sodium and chloride excretion
B)Decreased osmotic pressure in tissues
C)Excessive water intake by osmosis
D)Dehydration due to ion imbalance✓
💡 Explanation
When saltwater fish drink seawater, the active transport via chloride cells in the gills excrete excess salt; without sufficient chloride cell activity, the ingested salt accumulates, disrupting osmotic balance. Therefore dehydration occurs, rather than increased excretion, decreased pressure or water intake, all of which require proper osmoregulatory mechanisms.
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