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Homeostasis and Response
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For example, a reflex arc below is described for when we touch something hot
1) Receptors in our finger detect the stimulus (change in the environment-in this case the heat).
2) The receptors send this signal as information along a sensory neurone to the CNS (brain and spinal cord)
3) The CNS comes up with an effective response to protect us- in this case moving our finger away quickly
4) This information about the response is sent along the motor neurone to a muscle which will tell it to contract and pull our finger away from the heat.
A relay neurone is an interneurone connecting the motor and sensory neurone
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