Persistent breathing at small tidal volumes typically results in ...

[Frost2351]

Persistent breathing at small tidal volumes typically results in which of the following?
 
  a. Reabsorption atelectasis
  b. Spontaneous pneumothorax
  c. Compression atelectasis
  d. Respiratory alkalosis

Question 2

Compared to air, the density of an 80 He and 20 O2 mixture is about which of the following?
 
  a. Two-thirds as much
  b. One-half as much
  c. One-third as much
  d. One-fifth as much

[pikon]

Answer to Question 1

ANS: C
Compression atelectasis is primarily caused by persistent use of small tidal volumes by the pa-tient.

Answer to Question 2

ANS: C
Although air has a density of 1.293 g/L, the density of an 80 helium mixture is 0.429 g/L.