Biology GCSE
Internal and external stimuli
What Internal and external stimuli means in Biology GCSE, as defined for AQA.
Definition of Internal and external stimuli
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Reference: AQA
Changes that may come from inside the body, such as a rise in blood glucose after a meal, or from outside, such as cold air lowering body temperature.
Topics that use Internal and external stimuli
- Homeostasis (AQA GCSE)
Related terms
- Denaturation as a permanent change
- Effect of temperature and pH on enzyme activity
- Effectors
- Enzyme structure and active site specificity
- Glucagon
- Homeostasis as protection for cell processes
- Insulin
- Negative feedback
Using Internal and external stimuli in the exam
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