Q:

The work of breathing increases when

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 The work of breathing increases when.


  1. Lung compliance increases.
  2. The subject exercises.
  3. The rate of breathing increases even though the minute volume stays constant.
  4. The subject lies down.
  5. Functional residual capacity increases.

All Answers

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A. False  Compliant lungs are easier to inflate. 

B. True  Since the rate and depth of ventilation are increased.

C. True  The work of breathing is minimal around the normal rate of breathing.

D. True   The increase in pulmonary blood volume increases lung stiffness and abdominal pressure on the diaphragm rises.

E. True  Lung compliance falls at higher lung volumes

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