Which of the following structures controls respirations?
Cerebellum
Medulla oblongata
Hypothalamus
Cerebrum
The Correct Answer is B
A. Cerebellum: The cerebellum coordinates movement and balance, not respiration.
B. Medulla oblongata: The medulla controls the rate and depth of breathing by monitoring CO₂ and pH levels.
C. Hypothalamus: The hypothalamus regulates homeostasis and emotions, not directly breathing.
D. Cerebrum: The cerebrum controls voluntary actions and higher-level thinking, not automatic respiration.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Bronchioles: Smaller branches that come after the bronchi.
B. Bronchi: Correct; the trachea divides into the right and left main (primary) bronchi.
C. Alveoli: Terminal ends of the respiratory tract where gas exchange occurs.
D. Nares: External nostrils, not connected directly to the trachea.
Correct Answer is B
Explanation
A. 90-95%: acceptable in some chronic conditions, but not the ideal normal.
B. 95-100%: this is the normal range for oxygen saturation in healthy adults.
C. 86-89%: indicates hypoxemia.
D. 80-85%: severely hypoxic, needs medical attention.
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