The bronchi, bronchioles, and alveoli are:
Surrounded by rings of cartilage
Upper respiratory structures
Collectively referred to as the bronchial tree
The sites of the exchange of respiratory gases
The Correct Answer is C
A. Surrounded by rings of cartilage: Only the larger bronchi are surrounded by cartilage; bronchioles and alveoli are not.
B. Upper respiratory structures: These are part of the lower respiratory tract.
C. Collectively referred to as the bronchial tree: This is the correct term for the branching airway system from the trachea to alveoli.
D. The sites of the exchange of respiratory gases: Only the alveoli are directly involved in gas exchange.
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Related Questions
Correct Answer is D
Explanation
A. Breathing muscles: diaphragm, intercostals- these are the primary muscles responsible for ventilation.
B. Respiratory gases: oxygen and carbon dioxide- these are the main gases exchanged during respiration.
C. Structures of the upper respiratory tract: nose, pharynx, larynx- these are part of the upper respiratory tract.
D. Structures of the bronchial tree: trachea, bronchi, bronchioles, alveoli- the trachea is part of the conducting zone but not part of the bronchial tree. The alveoli are part of the respiratory zone, not the bronchial tree.
Correct Answer is B
Explanation
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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