Question

Which of the following are functions of the upper airway?
I. Conduction of gas to lower airway
II. Prevent foreign materials from entering lower airway
III. Warm, filter, and humdify inspired gas
IV. Aid in speech and smell
a. I, II, III, and IV
b. I, II, and III only
c. I, III, and IV only
d. I, II, and IV only

Answer

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