Homeostasis

Explanation or usage

Cells function within limits of temperature, acidity, and available nutrients. Homeostatic systems sense deviations and coordinate responses that help preserve a viable internal environment. Regulation is dynamic: values can fluctuate around a range, and maintaining a stable variable may require continuous energy and activity.

Common misunderstandings

Homeostasis means every body variable stays perfectly constant.

In Guyton and Hall Textbook of Medical Physiology E-Book (Guyton Physiology)

General context reviewed · book attribution and sources pending

Educational physiology context: regulation of the extracellular environment; not clinical advice.