Which of the following occur(s) during the compression phase of a cough? 1. Expiratory muscle contraction 2. Opening of the glottis 3. Rapid drop in alveolar pressure
a. 1 and 2 only
b. 2 and 3 only
c. 1 and 3 only
d. 1 only
ANS: D
During the third or compression phase, reflex nerve impulses cause glottic closure and a forceful contraction of the expiratory muscles.
Health Professions
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