| Front | Take me through the stages after someone touches a hot object |
|---|---|
| Back | 1. Electrical impulse at pain receptor in skin
2. Sensory neurone carries nerve impulse to the spinal cord
3. Neurotransmitter crosses synapse, starting impulse in relay neurone
4. Relay neurone carries nerve impulse through the spinal cord
5. Neurotransmitter crosses a synapse, starting impulse in a motor neurone
6. Impulse travels through the motor neurone
7. Impulse carried to effector, for example, muscle.
8. Muscle moves hand away from a hot object |
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