Answer to Question 1
ANS: C
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A Incorrect: This agent is not a bronchodilator.
B Incorrect: This agent is not a mucolytic.
C Correct: Lack of surfactant is the most common cause of neonatal respiratory distress syndrome in premature infants. Colfosceril malmitate is a lung surfactant.
D Incorrect: This agent is not a sympathomimetic.
Answer to Question 2
ANS: D
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A Incorrect: This is not an action of propranolol, which blocks beta-2 receptors.
B Incorrect: This is not an action of propranolol, which blocks beta-2 receptors.
C Incorrect: This is not an action of propranolol, which blocks beta-2 receptors.
D Correct: a., b., and c. are all correct.