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Homeostasis

Homeostasis. Homeostasis. All body systems working together to maintain a stable internal environment Systems respond to external and internal changes to function within a normal range (body temperature, fluid balance). Failure to function within a normal range results in disease.

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Homeostasis

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  1. Homeostasis

  2. Homeostasis • All body systems working together to maintain a stable internal environment • Systems respond to external and internal changes to function within a normal range (body temperature, fluid balance)

  3. Failure to function within a normal range results in disease

  4. Mechanisms of Regulation • Autoregulation(intrinsic): • automatic response in a cell, tissue, or organ • Extrinsic regulation: • responses controlled by nervous and endocrine systems

  5. Maintaining Normal Limits

  6. Maintaining Normal Limits • Receptor: • receives the stimulus • Control center: • processes the signal and sends instructions • Effector: • carries out instructions

  7. Negative Feedback • The response of the effector negates the stimulus

  8. Positive Feedback • The response of the effector reinforces the stimulus

  9. Working Together

  10. Working Together • Systems integration: • systems work together to maintain homeostasis

  11. KEY CONCEPT • Homeostasis is a state of equilibrium: • opposing forces are in balance • Physiological systems work to restore balance • Failure results in disease or death

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