AP BIOLOGY

Detailed explanation-1: -Most marine invertebrates such as starfish, jellyfish and lobsters are osmoconformers. Osmoregulators are organisms that actively regulate their osmotic pressure, independent of the surrounding environment.

Detailed explanation-2: -Osmoregulators actively control salt concentrations despite the salt concentrations in the environment. An example is freshwater fish. The gills actively uptake salt from the environment by the use of mitochondria-rich cells.

Detailed explanation-3: -Plants maintain their upright shape with the help of osmotic pressure. When sufficient water is supplied to the plant, its cells (which contain several salts) absorb water and expand. This expansion of plant cells increases the pressure exerted on their cell walls, causing them to stand upright.

Detailed explanation-4: -Osmosis plays an important role in the human body, especially in the gastro-intestinal system and the kidneys. Osmosis helps you get nutrients out of food. It also gets waste products out of your blood.