Which of the following are the primary functions of the nasal cavity? 1. Conduction of gases 2. Filtration and defense 3. Gas exchange 4. Heat and humidify

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

ANS: D
The primary functions of the nasal cavity are to serve as a gas passageway, and to filter, humidi-fy, and heat inhaled gases.

Health Professions

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