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Multiple Choice
What happens to your pupils when it is extremely bright outside?
A
They remain unchanged regardless of light conditions.
B
They constrict to reduce the amount of light entering the eye.
C
They alternate between dilating and constricting.
D
They dilate to let in more light.
Verified step by step guidance
1
Understand the function of the pupil: The pupil is the opening in the center of the iris that regulates the amount of light entering the eye.
Recognize the role of the iris: The iris is the colored part of the eye that controls the size of the pupil through its muscles.
Identify the response to bright light: In bright conditions, the circular muscles of the iris contract, causing the pupil to constrict.
Explain the purpose of constriction: Constriction of the pupil reduces the amount of light entering the eye, protecting the retina from excessive light exposure.
Conclude with the correct response: In extremely bright conditions, the pupils constrict to reduce the amount of light entering the eye.