What forces must be overcome to move air into the respiratory system?
1) Tissue movement
2) Elastic forces of lung tissue
3) Airway resistance
4) Surface tension forces

Question

Quizplus · Accepted Answer

To move air into the respiratory system, the forces that must be overcome include tissue movement (as muscles and thoracic structures adjust), elastic forces of lung tissue (which resist expansion), airway resistance (friction within the airways), and surface tension forces in the alveoli (which resist expansion due to the liquid lining).

What Forces Must Be Overcome to Move Air into the Respiratory