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15 Cards in this Set
- Front
- Back
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The sensory system |
makes us aware of our surroundings and allows us to respond |
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A stimulus |
causes us to take action |
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A response |
is an action taken as a result of the stimulus |
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The central nervous system |
is made up of the brain and the spinal cord |
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Some nerves |
carry messages from sense organs to the brain |
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The brain |
decides how to respond to the stimulus |
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Sensory nerves |
carry messages to the brain |
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Motor nerves |
carry messages away from the brain |
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the iris |
controls amount of light entering the eye |
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the pupil |
lets light into the eye |
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the lens |
focuses light on the retina |
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the retina |
absorbs light to allow us to see |
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the optic nerve |
carries messages from the eye to the brain |
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the cornea |
allows light to enter the front of the eye |
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the ciliary muscle |
changes the shape of the lens |
