THE HUMAN BODY AND HOMEOSTASIS
Homeostasis (ho¯ -me¯-o¯-STA¯ -sis; homeo- sameness; -stasis standing still) is the condition of equilibrium (balance) in the body’s internal environment due to the constant interaction of the body’s many regulatory processes. Homeostasis is a dynamic condition. In response to changing conditions, the body’s equilibrium can shift among points in a narrow range that is compatible with maintaining life. For example, the level of glucose in blood normally stays between 70 and 110 milligrams of glucose per 100 milliliters of blood.* Each structure, from the cellular level to the system level, contributes in some way to keeping the internal environmentof the body within normal limits.
Humans have many ways to maintain homeostasis, the state of relative stability of the body’s internal environment. Disruptions to homeostasis often set in motion corrective cycles, called feedback systems, that help restore the conditions needed for health and life.
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Homeostasis (ho¯ -me¯-o¯-STA¯ -sis; homeo- sameness; -stasis standing still) is the condition of equilibrium (balance) in the body’s internal environment due to the constant interaction of the body’s many regulatory processes. Homeostasis is a dynamic condition. In response to changing conditions, the body’s equilibrium can shift among points in a narrow range that is compatible with maintaining life. For example, the level of glucose in blood normally stays between 70 and 110 milligrams of glucose per 100 milliliters of blood.* Each structure, from the cellular level to the system level, contributes in some way to keeping the internal environmentof the body within normal limits.
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