Lung Toxicology Problem Set

Problem 9: Asthma and chronic obstructive pulmonary disease

Correct!

Asthma is caused by decreased airflow in and out of the lungs due to:

A.	small abnormalities in airways
B.	reversible bronchial spasms Asthma is due to a decrease in airflow in the major airways of the lungs. It can be caused by muscle spasms in the airways, swelling of cells lining the airways and excess mucus in the airways. Asthma is one of three respiratory diseases called "chronic obstructive pulmonary disease" that are often caused by smoking. The other two chronic obstructive pulmonary diseases are chronic bronchitis and emphysema. Chronic bronchitis is caused by small abnormalities in the airways. Emphysema is caused by destruction of the alveolar walls.
C.	destruction of alveolar walls
D.	allergic reaction in lung tissues