1. Pleasure and pain. How your nervous system keeps you in touch with your world.

2. Stimulus.Receptor.CoordinatorEffector.Response. Packet of sweets. Eye.Brain.Arm muscle. Pick up a sweet. Ear.Neck muscles. Hot iron. Spinal cord.Move hand away. Light sensitive cells in the retina at the back of the eye. Iris.Enlarges so the pupil gets smaller. Nettle plant. Pain receptor in the skin of your leg. Leg muscle. Move away from nettle.

3. Use the statements to fill in the table, watch out there are two mistakes. Spinal cord Brain Regain balance Bright light Arm muscle Friend talking Chemical receptors in the noise Pain receptor in the skin Turn to look at friend