Which regulatory mechanism facilitates survival for salmon migrating from freshwater to saltwater environments?

💡 Explanation

When migrating to saltwater, salmon experience osmotic stress, triggering increased chloride cell activity in the gills because these cells actively excrete excess salt to maintain internal osmotic balance. Therefore increased chloride cell activity results, rather than kidney changes, mucus increase, or scale mineralization, which play lesser roles osmoregulation shifts.

• Which mechanism precisely controls sequential molting stages in holometabolous insect metamorphosis?
• Which outcome increases during avian molt due to feather loss?
• Which outcome decreases when a hummingbird experiences localized blockage in its air sacs?
• Which physiological response increases when vasodilation affects an animal's peripheral vessels in cold water?
• Which outcome disrupts metamorphosis when imaginal disc cells fail to express the Broad-Complex transcription factor?
• Which mechanism allows specialized herbivore guts to function effectively?