Respiratory System - Problem Set
Q. What is the primary site of gas exchange in the respiratory system?
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A.
Bronchioles
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B.
Trachea
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C.
Alveoli
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D.
Larynx
Solution
The primary site of gas exchange in the respiratory system is the alveoli.
Correct Answer: C — Alveoli
Q. What muscle is primarily responsible for inhalation?
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A.
Intercostal muscles
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B.
Diaphragm
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C.
Abdominal muscles
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D.
Pectoral muscles
Solution
The diaphragm is the primary muscle responsible for inhalation; it contracts and moves downward, increasing the thoracic cavity volume.
Correct Answer: B — Diaphragm
Q. Which of the following is a function of the nasal cavity?
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A.
Gas exchange
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B.
Filtering and warming air
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C.
Producing surfactant
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D.
Regulating blood flow
Solution
The nasal cavity filters, warms, and humidifies the air before it enters the lungs.
Correct Answer: B — Filtering and warming air
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