The sleep-wake cycle is ultimately controlled by the part of the brain called the ________.

• A. cerebellum
• B. hypothalamus
• C. medulla oblongata
• D. amygdala

Answer: (B)

Verified step by step guidance

1. Understand that the sleep-wake cycle is a biological rhythm regulated by specific brain structures.
2. Recall that the hypothalamus is a key brain region involved in regulating many autonomic functions, including sleep and wakefulness.
3. Recognize that the cerebellum primarily controls motor coordination, not sleep regulation.
4. Note that the medulla oblongata controls autonomic functions like breathing and heart rate, but not the sleep-wake cycle.
5. Identify the hypothalamus as the brain part responsible for controlling the sleep-wake cycle.