GCSE Biology - Homeostasis | Receptors, Coordination Centres, Effectors | Negative Feedback

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*** WHAT'S COVERED ***
1. Definition of homeostasis.
* Maintaining a stable internal environment for optimal cell function.
* Conditions regulated include temperature, pH, glucose, and water levels.
2. How homeostasis responds to changes.
* Adapting to both internal and external environmental conditions.
3. Automatic control systems in the body.
* The general mechanism for maintaining balance.
* Key components: Receptors, coordination centres, and effectors.
4. Communication within control systems.
* The role of the nervous system (using fast electrical impulses via nerves).
* The role of the endocrine system (using hormones transported in the bloodstream).
5. The negative feedback mechanism.
* Explanation of how deviations from the norm trigger corrective responses.
* Illustrated with the example of body temperature regulation (shivering and sweating).

*** CHAPTERS ***
0:00 What is Homeostasis?
0:17 Why Homeostasis is Important for Cells
0:36 How the Body Regulates Conditions
0:54 Definition of Homeostasis
1:10 Responding to Internal and External Changes
1:35 Automatic Control Systems
1:55 Components of Control Systems (Receptors, Coordination Centres, Effectors)
2:31 Communication via Nervous & Endocrine Systems
3:32 The Negative Feedback Mechanism
4:04 Negative Feedback Example: Body Temperature

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