Concept of homeostasis

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Concept of homeostasis

Biological homeostasis Homeostasis is one of the fundamental characteristics of living things. It is the maintenance of the internal environment within tolerable limits. The internal environment of a living organism's body features body fluids in multicellular animals.

Concept of homeostasis

The body fluids include blood plasma, tissue fluid and intracellular fluid. The maintenance of a steady state in these fluids is essential to living things as the lack of it harms the genetic material. With regard to any parameter, an organism may be a conformer or a regulator.

Regulators try to maintain the parameter at a constant level, regardless of what is happening in its environment. Conformers allow the environment to determine the parameter.

For instance, endothermic animals maintain a constant body temperature, while ectothermic animals exhibit wide variation in body temperature. This is not to say that conformers may not have behavioral adaptations that allow them to exert some control over the parameter in question.

For instance, reptiles often sit on sun-heated rocks in the morning to raise their body temperatures.

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An advantage of homeostatic regulation is that it allows the organism to function more effectively. For instance, ectotherms tend to become sluggish at low temperatures, whereas endotherms are as active as always. On the other hand, regulation requires energy. One reason snakes are able to eat just once a week is that they use much less energy for maintaining homeostasis.

Ecological homeostasis Ecological homeostasis is found in a climax community of maximum permitted biodiversity, given the prevailing ecological conditions. In disturbed ecosystems or sub-climax biological communities such as the island of Krakatoa, after its major eruption inthe established stable homeostasis of the previous forest climax ecosystem was destroyed and all life eliminated from the island.

In the years after the eruption, Krakatoa went through a sequence of ecological changes in which successive groups of new plant or animal species followed one another, leading to increasing biodiversity and eventually culminating in a re-established climax community.

This ecological succession on Krakatoa occurred in a number of several stages, in which a sere is defined as "a stage in a sequence of events by which succession occurs".

The complete chain of seres leading to a climax is called a prisere. In the case of Krakatoa, the island as reached its climax community with eight hundred different species being recorded inone hundred years after the eruption which cleared all life off the island.

Evidence confirms that this number has been homeostatic for some time, with the introduction of new species rapidly leading to elimination of old ones.Explain the Concept of Homeostasis (P5) The main concept of homeostasis is to maintain a constant environment inside the body.

It does this by controlling certain systems throughout the body, keeping it at the normal environment. Homeostasis is the state of steady internal conditions maintained by living things.

This dynamic state of equilibrium is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits (homeostatic range). Homeostasis is a key concept in biology. The concept of homeostasis is the description for when the internal conditions of living organisms remain stable (within a normal range), regardless of what is going on in the external environment.

These internal conditions include your body temperature, pH. Allostasis is the process of achieving stability, or homeostasis, through physiological or behavioral change. This can be carried out by means of alteration in HPA axis hormones, the autonomic nervous system, cytokines, or a number of other systems, and is generally adaptive in the short term (McEwen & Wingfield ).

Homeostasis is the ability of an organism to maintain a stable, constant internal environment, even when the external environment changes.

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Humans maintain homeostasis in processes such as controlling temperature, blood pressure and respiration as well as maintaining a balance in pH and electrolytes. What is Homeostasis? Negative feedback is a central homeostatic and cybernetic concept, referring to how an organism or system automatically opposes any change imposed upon it.

Allostasis - Wikipedia