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?
Responses
Her pupils shrink because the muscles relax.
Her pupils shrink because the muscles relax. - no response given
Her pupils shrink because the muscles contract.
Her pupils shrink because the muscles contract. - not selected, this is the correct answer
Her pupils grow because the muscles contract.
Her pupils grow because the muscles contract. - no response given
Her pupils grow because the muscles relax. explain your anwer
1 answer
Her pupils grow because the muscles relax. The muscles that control the size of the pupils, known as the iris sphincter muscles, are responsible for constricting or dilating the pupils. When these muscles relax, they allow the pupils to enlarge or dilate, allowing more light to enter the eyes.
2 answers