2. Which of the following statement is or are correct. O Saline is a solution of salt in water Saline environment refers to salty water as is present in seas and oceans O Marine organisms are adapted to saline environment O All the above statements are correct
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saline environment refers to salty water as in present in seas and oceans
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Surviving in Salt Water
Part of the Water: H2O = Life exhibition.
MORE IN WATER: H2O = LIFE
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No matter how thirsty you are, drinking seawater will only make you thirstier. Seawater is too salty for humans and most land animals--it's about 3.5 percent salt by weight. Seawater dehydrates you because the amount of water needed to flush the excess salt from your body would be more than what you drank. But many animals that live in or near the ocean have evolved ways to pump out the extra salt while keeping their water levels in balance.
Secreting Salt
A wandering albatross spends months at a time flying or floating on the open ocean, far from any source of fresh water. So albatrosses have evolved a way to drink seawater, which is too salty for most birds and land animals. To get rid of excess salt from the water and food they ingest, albatrosses have salt glands just behind their eye sockets. The glands excrete a highly concentrated salt solution that drains out through the tip of the beak.
Soaking in Salt
Most fish that live in the ocean tend to lose water--the high salt content of the ocean causes water to constantly flow out through the fish's gills. So fish need to drink lots of seawater to stay hydrated. And because seawater is so salty, they also must pump out the excess salt, both through their kidneys and using specialized cells in their gills.
Bony Saltwater Fish
Water naturally seeks a chemical balance, or equilibrium. That means water flows from areas of higher water concentration to areas of lower water concentration to equalize the system. Water concentration inside a fish is higher than in the ocean itself because the ocean is so salty. As a result, most saltwater fish constantly lose water through their gills and skin.
Because the fish is losing water, it must drink a lot to stay hydrated-but salty seawater is the only water around.
To get rid of excess salt, the fish's kidneys pump lots of salt into its urine.
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