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)
Her pupils shrink because the muscles contract.
O Her pupils grow because the muscles relax
Her pupils shrink because the muscles relax
Her pupils grow because the muscles contract
Her pupils shrink because the muscles contract.
Her pupils will shrink because the muscles in the iris contract.
The correct answer is: Her pupils shrink because the muscles contract.
When a girl opens her eyes, her pupils naturally shrink. This happens due to the contraction of the muscles in the iris called the iris sphincter muscles. These muscles surround the pupil and control its size.
In a brightly lit room, the pupil needs to constrict to limit the amount of light that enters the eye. This is to protect the sensitive structures within the eye and prevent an overwhelming amount of light from reaching the retina.
The iris sphincter muscles contract in response to signals from the autonomic nervous system. Specifically, the parasympathetic nervous system sends signals to these muscles to contract, causing the pupils to become smaller.
So, in summary, her pupils shrink because the muscles in the iris contract to limit the amount of light entering the eye.