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Paper 4Theory (Extended)2 marks
The pupil reflex adjusts pupil size to control light entering the eye.
Description
Pupil Reflex Description
When light intensity increases, the pupil becomes smaller. When light intensity decreases, the pupil becomes larger.
- a[1]
State which muscles contract to make the pupil smaller.
Aim for approximately 1 distinct marking point.
- b[1]
State which muscles contract to make the pupil larger.
Aim for approximately 1 distinct marking point.
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