________ is used to measure lung-volume changes by collecting exhaled gas into an expandable wedge-shaped device

a. A bellows spirome-ter c. A vortex pneumo-tachometer
b. A water-sealed spi-rometer d. A screen pneumo-tachometer


ANS: A
The expandable wedge-shaped device is a bellows, making this a bellows spirometer.

Health Professions

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