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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