Inhalation of dry gases can do which of the following? 1. Increase viscosity of secretions. 2. Impair mucociliary motility. 3. Increase airway irritability
a. 1 and 2 only
b. 3 only
c. 1 and 3 only
d. 1, 2, and 3
ANS: D
As the airway is exposed to relatively cold, dry air, ciliary motility is reduced, airways become more irritable, mucous production increases, and pulmonary secretions become inspissated (thickened due to dehydration).
Health Professions
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