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Nature & Animals

Which effect occurs in marine fish within estuaries as freshwater inflow increases?

A)Increased chloride cell activity
B)Reduced water intake necessity
C)Decreased active salt secretion
D)Enhanced nitrogenous waste excretion

💡 Explanation

Decreased active salt secretion by chloride cells occurs because freshwater inflow reduces salinity; the osmoregulation mechanism detects a less hypertonic environment, therefore less active transport is needed rather than cell activity continuing at the initial rate.

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