Question | Answer |
What are the five senses | Sight, Hearing, Smell, Taste and Touch |
What are the five sense organs | Eye, Ear, Nose, Tongue and Skin |
What is a stimulus | Something that creates a reaction |
What does the nervous system consist of | Brain and Spinal Cord and nerves form spinal cord |
What do you call a nerve that carries a message to the brain | Sensory nerve |
What do you call a nerve that carries a message away from the brain | Motor |
What do you call a quick action that happens when a message is sent to the spinal cord and a response is sent from there to the muscle and then the brain | Reflex action |
What is the function of the cornea | To bend the light rays inwards |
What is the function of the lens | To focus light on the retina |
What is the function of the ciliary muscle | To contract and relax so to change the shape of the lens during focusing |
What is the function of the retina | It contains light sensitive cells |
What is the function of the optic nerve | Carries messages to the brain |
What is the function of the iris | Its the coloured part that controls the amount of light entering the eye |
What do you call the dark hole in the eye | Pupil |
Why does the hole appear black | Because no light is reflected out, it is all absorbed |