As the sun begins to set, Winston finds himself becoming sleepier and sleepier. What structure is sensitive to light and influences when to go to sleep and when to awaken?
A) suprachiasmatic nucleus
B) corpus callosum
C) occipital lobe
D) thalamus

Question

Quizplus · Accepted Answer

The suprachiasmatic nucleus is a structure in the brain that is sensitive to light and helps regulate our sleep-wake cycle. As the sun begins to set and light levels decrease, the suprachiasmatic nucleus signals to the body that it is time to start feeling sleepy and prepare for nighttime rest.

As the Sun Begins to Set, Winston Finds Himself Becoming