What is the primary mechanism that stops the lungs from ...

[awywial]

What is the primary mechanism that stops the lungs from collapsing at the end of exhalation?
 
  a. Radial tethers, stretched to their maximum length, then halt lung collapse.
  b. Surfactant neutralizes the tendency of the lung to collapse.
  c. There is a tendency of the chest wall to lock at the level of FRC.
  d. There is an equal opposing tendency of the chest wall to expand.

Question 2

What will happen when the lung is surgically removed from the thorax?
 
  a. The lung will appear to undergo no change.
  b. The lung will collapse.
  c. The lung will expand.
  d. The response of the lung will depend on its age and pathology.

[nmyers]

Answer to Question 1

ANS: D
This tendency of the lung to collapse is counteracted by the thoracic wall's tendency to spring outward and to hold the lung inflated.

Answer to Question 2

ANS: B
When a lung is removed from the chest cavity, it quickly collapses to a smaller size.

[awywial]

Excellent

[Kedrick2014]

Gracias!