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GCSE Combined Science · key term
A change in the internal or external environment that can be detected by a receptor.
Used by AQA and Edexcel
Specification 6.5.4.3.2 · Paper 2, Paper 6
A change that can be detected and can trigger a response, such as a ruler starting to fall.
Paper 1, Paper 2
Revise: The Nervous SystemA change that can be detected is called a stimulus. Light, temperature, touch and chemicals in food are examples.
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