Question

Which best describes homeostasis?

Answer 1

Homeostasis can be defined as the stable condition of an organism and of its internal environment;[1] or as the maintenance or regulation of the stable condition, or its equilibrium;[2] or simply as the balance of bodily functions.[3] The stable condition is the condition of optimal functioning for the organism, and is dependent on many variables, such as body temperature and fluid balance, being kept within certain pre-set limits.[4] Other variables include the pHof extracellular fluid, the concentrations of sodium, potassium and calcium ions, as well as that of the blood sugar level, and these need to be regulated despite changes in the environment, diet, or level of activity. Each of these variables is controlled by one or more regulators or homeostatic mechanisms, which together maintain life.

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