Author Question: Approximately what percent of the normal changes in thoracic volume during quiet inspiration is due ... (Read 41 times)

Pineapplelove6

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Approximately what percent of the normal changes in thoracic volume during quiet inspiration is due to the action of the diaphragm?
 
  a. 15
  b. 25
  c. 50
  d. 75

Question 2

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



DylanD1323

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Answer to Question 1

ANS: D
During quiet breathing, the diaphragm is responsible for approximately 75 of the change in thoracic volume.

Answer to Question 2

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.



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