The "work" required for normal breathing is:
A)contraction of the respiratory muscles for inhalation
B)contraction of the respiratory muscles for exhalation
C)both A and B
D)neither A nor B because breathing is a reflex

Question

Quizplus · Accepted Answer

The work required for normal breathing primarily involves the contraction of the respiratory muscles for inhalation, such as the diaphragm and intercostal muscles, to create a negative pressure that draws air into the lungs. Exhalation under resting conditions is mostly a passive process due to the elastic recoil of the lungs and chest wall.

The "Work" Required for Normal Breathing Is