Concepts of Lifetime Fitness Homeostasis is the state of equilibrium in which the internal environment of the human body remains relatively constant.  Two excellent examples of homeostasis are how the body maintains a constant temperature and blood pressure during strenuous physical activity or exercise.  Although there are many other activities in the body that display homeostasis, I will only discuss these two.   Temperature in the human body is usually kept at approximately 37 degrees Celsius.  To maintain such a strict temperature, the body has a few functions to combat the outside elements.  People cannot make themselves cold as readily as make themselves hot, however I will mention both homeostasis functions.  When the external temperature decreases, a portion of the brain called the hypothalamus detects the drop by means of t....

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