Which part of brain controls transition between sleeping and wakefulness?
Correct answer: D. Pons
- A. Medulla oblongata
- B. Cerebellum
- C. Cerebrum
- D. Pons
Explanation
The pons contains the centres that switch the brain between sleep and wakefulness and it also regulates the rhythm of breathing alongside the medulla. The medulla is the tempting answer because it too is part of the brain stem, but its role is the automatic control of heart rate, breathing and blood vessel diameter. The cerebellum handles balance and coordination and takes no part in the sleep cycle.
This question appeared on the UHS MDCAT 2025 paper, which you can sit online with every answer explained.
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The brain includes the cerebrum, cerebellum, brainstem, hypothalamus and medulla, each with distinct roles in sensation, movement and homeostasis. Questions connect major brain regions with their functions, reflex control and coordination, while distinguishing involuntary responses from hormonal regulation.
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