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Questions and Answers
During inspiration, which dimension of the thorax is increased primarily by the contraction and downward movement of the diaphragm?
During inspiration, which dimension of the thorax is increased primarily by the contraction and downward movement of the diaphragm?
- Vertical diameter (correct)
- Anteroposterior diameter
- Transverse diameter
- All of the above
Which dimension of the thorax is increased during inspiration by the raising of the ribs, especially the second through sixth ribs?
Which dimension of the thorax is increased during inspiration by the raising of the ribs, especially the second through sixth ribs?
- None of the above
- Transverse diameter
- Anteroposterior diameter (correct)
- Vertical diameter
What causes the three diameters of the thorax to return to normal during expiration?
What causes the three diameters of the thorax to return to normal during expiration?
- Contraction and downward movement of the diaphragm
- None of the above
- Swinging of the ribs outward and upward
- Elastic recoil of the lungs, along with the weight of the thoracic walls (correct)
