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Nature & Animals

Which physiological consequence occurs when marine fish suffer gill cell damage affecting chloride cell function?

A)Increased passive salt ion influx
B)Decreased metabolic oxygen uptake
C)Increased osmotic water gain
D)Decreased urine production rate

💡 Explanation

When gill cells are damaged, the chloride cells, which actively transport chloride ions out of the fish to maintain osmotic balance within their environment, malfunction, since disrupted cellular mechanisms inhibit the chloride ion transportation via cotransporter proteins, facilitating passive salt ion influx. Therefore, increased passive salt ion influx results, rather than decreased metabolic uptake, water intake, or urine output, all of which relate to different osmoregulatory processes or oxygen transport.

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