Which physiological effect occurs when a saltwater fish is abruptly placed into freshwater?

💡 Explanation

When a saltwater fish abruptly enters freshwater, osmotic pressure rapidly increases inside the fish’s cells because water moves from low to high solute concentration, potentially causing cell lysis. Therefore, cell lysis is the initial effect, rather than ion loss, urea overload, or dehydration which are related to different osmoregulatory failures in hyper or hypo-osmotic environments.

• Which developmental constraint arises when damage occurs to imaginal disc cells in fly larvae?
• Which mechanism causes foraging honeybees to efficiently communicate food source directions?
• Which navigational error occurs most readily when birds ignore inclination angle?
• Which risk increases when background noise interferes with bat calls?
• Which developmental constraint could prevent full expression of imaginal disc morphology during metamorphosis?
• Which outcome occurs when rapid leaf abscission obstructs xylem transport?