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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Dissolved in plasma- only ~1.5% of oxygen is dissolved in plasma.
B. By hemoglobin- ~98.5% of oxygen binds to hemoglobin in red blood cells.
C. By bicarbonate- this primarily transports carbon dioxide, not oxygen.
D. By pulmonary surfactants- surfactant reduces surface tension in alveoli, not related to oxygen transport in blood.
Correct Answer is B
Explanation
A. Yearly chest x-rays- this detects disease but does not prevent it.
B. Don’t smoke or quit smoking- smoking is the most significant modifiable risk factor for COPD and lung cancer.
C. Daily exercise- while beneficial for overall health, it does not prevent lung disease as effectively as avoiding smoking.
D. Healthy diet- good nutrition supports health but is less specific for preventing lung diseases.
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