NERVOUS SYSTEM SPECIAL SENSE
PERIPHERAL NERVE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Why does your pupil increase in size when you enter a dark room?
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To protect the eye
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to allow more light to enter the eye
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to allow less light to enter the eye
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to look like a pirate
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Explanation:
Detailed explanation-1: -After a short time our vision improves. This is because in bright sunshine the pupil of our eye is small and when we just enter the darkened room very little light enters our eye due to which we cannot see properly. After a while, when the pupil of our eye expands, more light enters our eye and we can see clearly.
Detailed explanation-2: -The tiny muscles that make up the iris, known as the circular and radial muscles, relax and contract to maintain a fairly constant level of light entering the eye. In bright light, the circular muscles contract whilst the radial muscles relax. This causes the pupil to constrict and less light enters the eye.
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