SENSITIVITY IN ORGANISMS:
- Organisms are Able to Respond to Changes in Environment (Stimuli) for Survival
- The Nervous System allows the Body to Respond to Changes in the Environment and is Coordinated by the Brain
- Organisms can also have Reflexes which are Fast Involuntary Actions that Protect their Body from Damage
FACTORS NEEDED TO RESPOND TO ENVIRONMENT:
FACTOR
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EXPLANATION
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STIMULI
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Change in Environment
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RECEPTOR
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Specialised Cells that Detects Change in the Environment
E.g, Sensory Neurones in the Finger will Detect Heat
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EFFECTOR
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Part of the Body that Produces the Response
E.g Muscles in the Finger that Contract to Pull the Finger Away from the Heat
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