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Author Question: Approximately what percent of the normal changes in thoracic volume during quiet inspiration is due ... (Read 42 times)

Pineapplelove6

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on: Jul 16, 2018
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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Reply #1 on: Jul 16, 2018
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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