Question

The size of the iris and pupil can change size. If you walked from a bright room into a dark room, what would happen to the size of the iris and pupil?
Group of answer choices

the iris and pupil would not change size

the iris would get smaller, the pupil would get bigger.

the iris would get smaller, the pupil would get smaller

the iris would get bigger, the pupil would get smaller

the iris would get bigger, the pupil would get bigger

Answer 1

The correct answer is B. The iris would get smaller, the pupil would get bigger.

Explanation

The iris is the name by which the colored part of the eye is known, it is located between the cornea and the lens. In the central part of the iris, there is a round opening known as the pupil. The relationship between these two parts of the eye is very important to sight because between them they control the amount of light that enters the eye. This occurs when the eye is exposed to a high amount of light, the iris muscles make the pupil smaller and the iris larger, limiting light entry into the eye. When the eye is exposed to low amounts of light or darkness, the iris becomes smaller and the pupil enlarges, allowing more light to enter. According to the above, the correct answer is B. the iris would get smaller, the pupil would get bigger. Because it describes the behavior of the iris and the pupil when going from a bright room to a dark room.