________ is used to measure lung-volume changes by collecting ...

[ss2343]

________ 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]

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.

[ss2343]

TYSM

[essyface1]

Thanks for the timely response, appreciate it