Homeostasis is the ability of an organism to maintain its internal environment at optimal levels, in spite of changes in the external environment. There are a number of ways an organism can achieve homeostasis. One of the primary ways is to control the entry and exit of material into the body. In the case of cells, the cell membrane is the selective barrier that controls the entry and exit of materials. In the case of...
Homeostasis is the ability of an organism to maintain its internal environment at optimal levels, in spite of changes in the external environment. There are a number of ways an organism can achieve homeostasis. One of the primary ways is to control the entry and exit of material into the body. In the case of cells, the cell membrane is the selective barrier that controls the entry and exit of materials. In the case of human beings, we can decide on what to eat, what to inhale (through controlled environment, by use of technology) and what we come in contact with, thus controlling what goes inside our body. We also body systems to discard the useless materials from our body.
Another way organisms maintain the homeostasis is by responding in wake of a change in external or internal environment. For example, when the outside temperature is low, our body starts generating heat. When it is warm outside, we sweat and lose heat through perspiration and thereby control our internal temperature. Similarly, we maintain blood glucose levels.
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