Allostasis

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Allostasis

Allostasis (/ˌæloʊˈsteɪsɪs/; from the Greek allo, meaning "variable"; and stasis, a term used in biology to denote "stability through change") is a term coined by Peter Sterling and Joseph Eyer in the 1980s. It refers to the process by which the body responds to stressors in order to regain homeostasis.

Etymology

The term "allostasis" is derived from the Greek words allo, meaning "variable", and stasis, meaning "stability". It was first used in the context of physiology by Peter Sterling and Joseph Eyer in the 1980s to describe how the body maintains stability (or homeostasis) through change.

Definition

Allostasis involves a complex set of hormonal and behavioral adaptations that are activated in response to stress. These adaptations serve to protect the body and maintain homeostasis in the face of physical and psychological challenges. Allostasis is distinct from homeostasis in that it involves anticipation of future needs and preparation for them, rather than simply responding to present needs.

Related Terms

  • Homeostasis: The state of steady internal, physical, and chemical conditions maintained by living systems.
  • Stress (biology): The body's method of reacting to a challenge or physical and mental barrier.
  • Hormone: A signaling molecule produced by glands in multicellular organisms that target distant organs to regulate physiology and behavior.
  • Physiology: The scientific study of functions and mechanisms in a living system.

See Also

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