Medulla oblongata regulates breathing rate

Steps:

• Examine the diagram for brainstem structures at the base of the brain.
• Recall the medulla oblongata's role in autonomic functions like respiration.
• Locate the respiratory center in the medulla, which monitors blood CO2 and adjusts breathing.
• Identify option C as labeling the medulla oblongata.

Why C is correct:

• The medulla oblongata contains the dorsal and ventral respiratory groups, neural circuits that set the basic rhythm and rate of breathing per physiological definitions of brainstem control.

Why the others are wrong:

• A: Cerebrum processes voluntary actions and cognition, not involuntary breathing.
• B: Cerebellum maintains balance and motor coordination, unrelated to respiration.
• D: Hypothalamus controls homeostasis like temperature, not breathing rate.

Final answer: C