How far is the diaphragm pulled down during tidal breathing?

a. 1 to 2 cm
b. 3 to 5 cm
c. 6 to 8 cm
d. 8 to 10 cm


ANS: A
When the muscle fibers of the diaphragm are tensioned during inspiration, the dome of the dia-phragm is pulled down 1 to 2 cm.

Health Professions

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