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Discuss the Need for Osmoregulation in animals, using specific examples and environments All external environments fluctuate frequently. They can be relatively stable with small stochastic changes, or extremely random. So, no matter in which habitat they live, all organisms have to have the ability to survive in changeable circumstances. This is the fundamental basis of homeostasis, the process of maintaining a relatively constant internal environment. One of the major factors in homeostasis is the process of maintaining a constant osmotic pressure. Osmotic pressure is "the pressure that can potentially be created by osmosis between two solutions separated by a semi-permeable membrane"(Eckert Animal Physiology). This osmotic pressure is effectively the amount of pressure necessary to prevent osmotic flow between two solutions, and so it is important to maintain this value at a constant rate. Water entering a cell with no cell wall, as in animals, at a high rate, can cause the cell...

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