A girl has her eyes shut and is standing inside a brightly lit room. What happens to her pupils when she opens her eyes? Why?(1 point)
Responses
Her pupils shrink because the muscles contract.
Her pupils shrink because the muscles contract.
Her pupils shrink because the muscles relax.
Her pupils shrink because the muscles relax.
Her pupils grow because the muscles relax.
Her pupils grow because the muscles relax.
Her pupils grow because the muscles contract.
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she dies and all her limbs turn into fried chickens
Her pupils grow because the muscles relax.
The correct answer is: "Her pupils shrink because the muscles contract."
To understand why this happens, we need to know a bit about the anatomy of the eye. The pupil is the opening in the center of the iris, which is the colored part of the eye. The iris contains muscles called the iris sphincter and iris dilator.
When the girl's eyes are shut, her pupils are naturally dilated, meaning they are wide open to allow more light to enter the eye. However, when she opens her eyes, the muscles in the iris sphincter contract, causing the pupil to constrict or shrink in size.
The purpose of this contraction is to control the amount of light entering the eye. In a brightly lit room, there is already sufficient light, so the pupils need to become smaller to prevent too much light from entering the eye. This helps to regulate the amount of light that reaches the retina, where the visual information is processed.
So, when the girl opens her eyes, the muscles in her iris sphincter contract, causing her pupils to shrink or constrict in size.