28. A disease that causes inflammation and narrowing of the airways is:
• a) Emphysema
• b) Pneumonia
• c) Asthma
• d) Tuberculosis

29. A condition in which the alveoli are damaged, reducing their ability to exchange gases is called:
• a) Bronchitis
• b) Emphysema
• c) Asthma
• d) Pleurisy

30. The gas that is a waste product of the lungs is:
a) Oxygen
b) Nitrogen
c) Water vapor
d) Carbon Dioxide

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