Questions: 21 of 30 Concepts completed Multiple Cholce Questlon In the dark, what do pupils do? Dilate Close completely Constrict Need help? Review these concept resources. Rate your confidence to submit your answer. 2024 MCGre Search

The answer is the first one: Dilate.

Explanation for each option:

1. Dilate: This is the correct answer. In low light conditions, the pupils dilate (enlarge) to allow more light to enter the eye, which helps improve vision in the dark.
2. Close completely: This is incorrect. Pupils do not close completely in the dark; doing so would prevent any light from entering the eye, making it impossible to see.
3. Constrict: This is incorrect. Pupils constrict (become smaller) in bright light to reduce the amount of light entering the eye, not in the dark.

Summary: In the dark, pupils dilate to allow more light to enter the eye, enhancing vision in low-light conditions.