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Why does the pupil become smaller in bright light?

Answer and explanation

Correct answer: To control the light entering the eye

The governing concept is the pupillary light reflex, an involuntary protective response. In bright light, circular muscles of the iris contract and the pupil becomes smaller, limiting the amount of light entering the eye and protecting the retina from excessive stimulation. The pupil does not make food, amplify sound, or regulate blood sugar, so option A is correct.

Related tags

PupilIrisInvoluntary ResponseControl And CoordinationWorld Of LivingScienceClass 10 Mcq

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