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.
Frequently asked questions
What is the correct answer to this question?
To control the light entering the eye
Why is this the correct answer?
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.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
