A pulmonary embolism causes which of the following major pathologic and structural changes in the lungs?

1. Alveolar consolidation
2. Mucosal edema
3. Alveolar atelectasis
4. Pleural friction rub
a. 1, 3
b. 2, 4
c. 2, 3, 4
d. 1, 2, 3, 4

A
After a pulmonary embolism, alveolar consolidation and atelectasis can occur. Mucosal edema is associated with asthma. Pleural friction rub is associated with an empyema.