The suprachiasmic nuclei
A) report changes in light levels during the day and night to the optic nerve.
B) release growth hormone, which helps repair body tissues.
C) are located in the brain stem.
D) control falling asleep and awakening.

Question

Quizplus · Accepted Answer

The suprachiasmatic nuclei are located in the hypothalamus and play a key role in regulating our circadian rhythm, which controls our sleep-wake cycle. They help control the timing of falling asleep and awakening.

The Suprachiasmic Nuclei