Which sequence correctly describes normal inspiration?
Options
- A. Diaphragm contracts → thoracic volume increases → lung pressure decreases → air enters
- B. Diaphragm relaxes → thoracic volume increases → lung pressure increases → air enters
- C. Diaphragm contracts → thoracic volume decreases → lung pressure decreases → air enters
- D. Diaphragm relaxes → thoracic volume decreases → lung pressure decreases → air enters
- E. Diaphragm stops moving → lung pressure decreases → air enters