Question

light is converted into nerve impulses in the:

a. iris.

b. cornea.

c. optic nerve.

d. retina.

Explanation:

The retina contains photoreceptor cells (rods and cones) that convert light into nerve impulses. The iris controls light amount, the cornea focuses light, and the optic nerve transmits impulses (not convert light). So the correct answer is D.

Answer:

D. retina.