List any two osmoregulatory problems faced by fresh water vertebrates.
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Osmoregulation controls this balanceof water/salt concentrations. Freshwater fish are hypertonic to their water environment and therefore, water is continually diffusing into the fishthrough the gill membranes into the blood. The gills are also permeable to respiratory gases, ammonia waste products, and ions.
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Osmoregulation is the passive regulation of the osmotic pressure of an ... Osmotic pressure is a measure of the tendency of water to move into one ... An example is freshwater fish.
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