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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Related Questions
Correct Answer is D
Explanation
A. Decreased K⁺ levels: Not related to respiratory drive.
B. Increased O₂ levels: May actually suppress the drive to breathe in COPD patients.
C. Decreased CO₂ levels: Would reduce respiratory drive, not increase it.
D. Increased CO₂ levels: Correct; high CO₂ levels stimulate the respiratory center to increase breathing rate.
Correct Answer is B
Explanation
A. Decrease oxygenation due to decrease in muscle function- kyphosis primarily affects skeletal structure, not muscles.
B. Decrease oxygenation due to inability to change thoracic pressure adequately- kyphosis alters thoracic cage shape, restricting expansion and limiting pressure changes required for ventilation.
C. Decrease oxygenation due to loss of elasticity of lung tissue- this relates more to normal aging or emphysema, not kyphosis.
D. Decrease in oxygenation due to decrease nervous system response- kyphosis doesn’t affect the nervous system directly.
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