Author Question: ________ is used to measure lung-volume changes by collecting exhaled gas into an expandable ... (Read 51 times)

ss2343 · **on:** Jul 16, 2018

________ 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

Question 2

Which of the following is true concerning the Stead-Wells spirometer?

a. Counterweights are necessary.
b. The pen and bell move in opposite direc-tions.
c. The pen recorder is attached directly to the bell.
d. On exhalation, the bell and pen move downward.

frre432 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

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

Answer to Question 2

ANS: C
The pen recorder for the Stead-Wells spirometer is attached directly to the bell, so as the bell moves upward during exhalation, the pen also moves upward.