Answer to Question 1
B
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Activated complement stimulates chemotaxis (movement of monocytes, neutrophils, basophils, and eosinophils toward the antigen) and the release of hydrolytic enzymes; actions that result in the destruction or inactivation of the invading antigen. Opsonization is the coating of the antigen so that it is more readily recognized by phagocytic cells. Agglutination is the clumping of cells. Phagocytosis is the destruction of pathogens or cells.
Answer to Question 2
A
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Antitussives are drugs that suppress the cough reflex. Many disorders involving the respiratory tract, including the common cold, sinusitis, pharyngitis, and pneumonia are accompanied by an uncomfortable, nonproductive cough. Persistent coughing can be exhausting and can cause muscle strain and further irritation of the respiratory tract. Nasal sprays, oral decongestants, and mucolytics are not generally prescribed for chronic pharyngitis, however.