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Biology
Juinior Certificate
Term | Definition |
---|---|
Iris | Controls the amount of light entering the eye. |
Pupil | Allows light to enter the eye. |
Lens | Focuses light onto the Retina. |
Retina | Absorbs light to allow us to see. |
Optic nerve | Carries messages from the eye to the brain. |
Cornea (H) | Protects eye and allows light to pass through it. |
Ciliary muscle (H) | Causes the lens to change shape. |
Stimulus | Causes a reaction. |
Responce | Is the reaction. |
Neuron | A nerve cell. |
Sensory nerve | Carries messages to the brain. |
Motor nerve | Carries messages from the brain. |