When you are exposed to bright light, a reflex is initiated and your iris constricts to decrease pupil size. Which structure serves as a receptor in this system?
A) The retina
B) The iris
C) The eyelid
D) The brain's visual cortex

Question

Quizplus · Accepted Answer

The retina contains photoreceptor cells that detect light intensity and initiate the reflex that leads to the constriction of the iris.

When You Are Exposed to Bright Light, a Reflex Is