Answer to Question 1
ANS: D
Fibrinous exudates occur in the lungs of individuals with pneumonia. Serous fluid is watery flu-id, as in a blister. Purulent is characterized by an abscess, such as pus. Hemorrhagic occurs when the exudates are filled with erythrocytes.
Answer to Question 2
ANS: B
The classical pathway of the complement system is activated by antibodies of the immune sys-tem, not by histamine, leukotrienes, or prostaglandins.