-The nervous system enables humans to react to their surroundings and coordinate their behaviour.
- Information from receptors pass along cells called neurones in nerves to the brain.
- Nerver impulses are electrical signals.
Steps Reflexs are the same but go to a relay neurone not CNS (quicker).
3. Sensory neurone
4. Central nervous system
5. Motor neurone
When an impulse reaches the end one of the neurones, it causes a chemical to be released called a neuronetransmitter which defuses across the gap and stimulates the impulse to continue in the next neurone.