The pupil of the eye becomes smaller in bright light. What is the main benefit of this response?
Answer and explanation
Correct answer: It reduces the amount of light entering the eye
The governing concept is the pupil reflex, which regulates the amount of light reaching the retina. In bright conditions, circular muscles of the iris contract and make the pupil smaller. This limits incoming light and helps protect the retina while preventing excessive glare. Therefore option A is correct. Digestion, blood pumping, and sound detection are not functions of the pupil or iris.
Frequently asked questions
What is the correct answer to this question?
It reduces the amount of light entering the eye
Why is this the correct answer?
The governing concept is the pupil reflex, which regulates the amount of light reaching the retina. In bright conditions, circular muscles of the iris contract and make the pupil smaller. This limits incoming light and helps protect the retina while preventing excessive glare. Therefore option A is correct. Digestion, blood pumping, and sound detection are not functions of the pupil or iris.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: The Human Eye and the Colourful World. Topic: Structure of eye.
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