Combined Science GCSE
Stability of internal conditions
What Stability of internal conditions means in Combined Science GCSE, as defined for AQA.
Definition of Stability of internal conditions
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Reference: AQA
Thyroxine concentration in the blood is kept within a narrow range, preventing it drifting too high or too low.
Topics that use Stability of internal conditions
- Feedback systems (HT only) (AQA GCSE)
Related terms
- 'Flight or fight'
- Adrenaline
- Hormonal signalling and control
- Hypothalamus, pituitary and thyroid axis
- Negative feedback
- Thyroxine
- Adrenal glands
- Basal metabolic rate
Using Stability of internal conditions in the exam
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