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The Physics and Chemistry of Homeostasis [image003.gif] Melanie Harris Homeostasis and Feedback A) Homeostasis is the maintenance of a stable internal environment within tolerance limits this is the restricted range of conditions where cellular operations are able to work at a consistent rate and maintain life. Homeostasis also adjusts to the changing circumstances of the external environment, e.g. a cold climate. Homeostasis is a self-adjusting system (auto-regulation), which involves biological feedback. Feedback is the general workings of nervous or hormonal regulation within the body. Homeostasis must maintain cells, tissues and the body in a state of equilibrium in order for life to be sustained. The human body has particular physical features such as the skin and circulatory system, which help its survival the environment. The metabolism is able to adjust to changes in conditions both internally and externally, as they are experienced. Biological Feedback Negative feedback: when the response reduces the...

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