Stimulant expectorants work by which of the following mechanisms? 1. ?-Adrenergic stimulation 2. Vagal gastric reflux stimulation 3. Direct stimulation of glands in the respiratory tract 4. Topical stimulation 5. Cholinergic stimulation

a. 1 and 5 only
b. 1, 3, 4, and 5 only
c. 2, 3, and 4 only
d. 1, 2, 3, 4, and 5


ANS: C

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