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AQA GCSE · Question 08.1 · Homeostasis and Response
Conditions inside and outside of the human body often change. Homeostasis helps the human body to survive changing conditions.
Explain what is meant by the term 'homeostasis'.
Conditions inside and outside of the human body often change. Homeostasis helps the human body to survive changing conditions.
Explain what is meant by the term 'homeostasis'.
How to approach this question
1. Start by stating what homeostasis is in simple terms (maintaining a stable internal environment).
2. Mention what is being regulated (internal conditions, e.g., temperature, blood glucose).
3. State why this regulation is important (for optimal cell/enzyme function).
Full Answer
Homeostasis is the regulation of the internal conditions of a cell or organism to maintain a stable, constant internal environment in response to internal and external changes.
Homeostasis is the process by which living organisms maintain a stable and relatively constant internal environment, despite changes in either the external environment or internal conditions. This involves monitoring and adjusting various physiological variables within a narrow range. Key examples in humans include the regulation of body temperature (thermoregulation), blood glucose levels, and water balance (osmoregulation). This stability is crucial because the body's cells and enzymes function optimally only within specific conditions of temperature, pH, and solute concentration.
Common mistakes
✗ Just saying "keeping the body the same" - it needs to refer to the internal environment.
✗ Forgetting to mention that this is a response to changes.
✗ Giving an example (like temperature control) instead of a definition.
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