A complete ventilatory cycle or breath consists of which of the following phases? 1. Expiration 2. Initiation of inspiration 3. Inspiration 4. End of inspiration
a. 1 and 4 only
b. 2 and 3 only
c. 1, 2, and 4 only
d. 1, 2, 3, and 4
ANS: D
A complete ventilatory cycle or breath consists of four phases: the initiation of inspiration, inspi-ration itself, the end of inspiration, and expiration.
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