Respiratory Muscles That Become Active When the Depth and Frequency

question 22

Multiple Choice

Respiratory muscles that become active when the depth and frequency of respiration must be increased markedly include the

• A)external and internal intercostals.
• B)diaphragm.
• C)sternocleidomastoid, serratus anterior, and scalenes.
• D)transversus thoracis, abdominal obliques, and rectus abdominis.
• E)All of the answers are correct.

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