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When the Muscles of Respiration Relax

Question 8

Multiple Choice

When the muscles of respiration relax,


A) thoracic volume decreases and air moves out of the lungs.
B) thoracic volume increases and air moves out of the lung.
C) thoracic volume decreases and air moves into the lungs.
D) thoracic volume decreases and intrapulmonic pressure decreases.

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