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← Nature & AnimalsWhich outcome occurs when marine fish experience reduced water salinity due to unusually heavy rainfall?
A)Kidney sodium reabsorption decreases
B)Gill chloride cell activity increases✓
C)Osmotic water outflow is minimized
D)Intestinal water absorption increases
💡 Explanation
When marine fish experience reduced salinity, the osmotic gradient decreases, triggering increased gill chloride cell activity via active transport to absorb chloride ions and maintain internal homeostasis. Therefore B results, rather than inhibited reabsorption, water minimization, or increased absorption which counteract gradient changes.
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