When Stewart wakes up at night and has to walk from his bedroom to the bathroom in the dark,he is most directly aided in this process by his
A)rods.
B)corneas.
C)cones.
D)irises.

Question

Quizplus · Accepted Answer

Rods are photoreceptor cells in the retina that are sensitive to low levels of light and are responsible for night vision. In dark conditions, when there is not enough light to activate the cones (photoreceptor cells responsible for color vision and visual acuity), the rods are activated and allow us to see in low light conditions. Therefore, when Stewart is walking in the dark, his rods are primarily responsible for aiding his vision.

When Stewart Wakes Up at Night and Has to Walk