1. A pulmonary physiologic dead space is:
a. the total volume of airways (anatomic volume).
b. the total volume of airways and alveoli.
c. one composed only of nonperfused alveoli.
d. that part of the tidal volume that is inspired but takes
no part in gas exchange.
2. When the lungs are expanded during inspiration:
a. the pressure inside the venae cavae is increased.
b. the pressure inside the venae cavae is decreased.
c. there is no change in the pressure inside the venae
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