Biology Iris Reflexes
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4 Terms
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What happens to the eye in Bright Light
The circular muscles contract, and the radial muscles relax, so the pupil becomes constricted.
2
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Why does the pupil constrict in bright light?
To prevent damage to the eye in high light intensity
3
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What happens to the eye in dim light
The circular muscles relax, and the radial muscles relax, making the pupil dilate
4
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Why does the pupil dilate in dim light
To allow more light to enter the eye for better vision
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