The nervous system and reflex actions

The nervous system

The nervous system - Enables you to co-ordinate your behaviour and react to your surroundings

• (electrical) Impulses carry message very quickly around your body so you can react quickly to different situations.
• Changes to you or your surroundings are called stimuli e.g. loud noise, touching a hot oven.
• These changes are picked up by cells called receptors which in clusters are called sense organs e.g. ears, eyes, skin

How it works

• Once the receptors have detected a stimuli an (electrical) impulse is sent up a sensory neuron until it reaches…