Homeostasis Simplified Revision Notes for GCSE AQA Biology Combined Science

Revision notes with simplified explanations to understand Homeostasis quickly and effectively.

Learn about Hormones: Maintaining Blood Homeostasis for your GCSE Biology Combined Science Exam. This Revision Note includes a summary of Hormones: Maintaining Blood Homeostasis for easy recall in your Biology Combined Science exam

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5.2.1 Homeostasis

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Homeostasis is the maintenance of a constant internal environment. Mechanisms are in place to keep optimum conditions despite internal and external changes. This is needed for enzyme action and all cell functions.

In the human body, homeostasis controls:

Blood glucose concentration
Body temperature
Water levels

Nervous and hormonal communication is involved in the automatic control systems, which detect changes and respond to them.

All control systems have:

Receptors cells that detect stimuli (changes in the environment)
Coordination centres process the information received from the receptors, e.g. brain, spinal cord and pancreas
Effectors bring about responses to bring the conditions in the body back to optimum levels, e.g. muscles or glands

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