Certified Travel Counselor (CTC) Practice Exam

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Question: 1 / 445

During physical activity, which muscle assists the diaphragm and external intercostals with the process of inspiration?

Biceps brachii

Deltoids

Pectoralis minor

The pectoralis minor is the correct choice as it plays a significant role in aiding the process of inspiration during physical activity. This muscle is located beneath the pectoralis major and assists with respiration, specifically during deep or forced inhalation. When the arms are elevated, as in activities like raising your arms or during vigorous exercise, the pectoralis minor can help expand the rib cage, which facilitates a deeper intake of air.

In contrast, the biceps brachii primarily functions to flex the elbow and is not involved in the respiratory process. The deltoids are primarily responsible for shoulder movements rather than directly contributing to breathing mechanics. Similarly, the rhomboids are more focused on the retraction of the scapula and do not have a significant role in the expansion of the thoracic cavity during inspiration. Thus, the pectoralis minor is uniquely positioned to assist alongside the diaphragm and external intercostals during intense physical activity.

Certified Travel Counselor (CTC) Practice Exam

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