Exhalation below the resting level requires active muscular ...

[mia]

Exhalation below the resting level requires active muscular effort in order to overcome what ten-dency?
 
  a. The airways to collapse
  b. The alveoli to expand
  c. The chest wall to expand
  d. The lungs to expand

Question 2

At approximately what point during a maximum inspiration does the chest wall reach its natural resting level?
 
  a. Approximately 30 of the VC
  b. Approximately 40 of the total lung ca-pacity (TLC)
  c. Approximately 70 of the VC
  d. Approximately 90 of the VC

[javimendoza7]

Answer to Question 1

ANS: C
In order to exhale below the resting level (FRC) muscular effort is required to overcome the ten-dency of the chest wall to expand.

Answer to Question 2

ANS: C
When lung volume nears 70 of the VC, the chest wall reaches its natural resting level.