Which muscles assist in inhalation when running up the stairs? a) sternocleidomastoid, pectoralis major, scalenes b) sternocleidomastoid, pectoralis minor, scalenes c) rectus abdominis, pectoralis major, scalenes d) rectus abdominis, pectoralis major, internal intercostals e) sternocleidomastoid, pectoralis major, internal intercostals

The correct answer will be option-B

Explanation:

The muscles used in the breathing process involves the thoracic muscles like external intercostal muscles, internal intercostal muscles, muscles attached to thoracic muscles like pectoralis major and minor and the accessory muscles like sternocleidomastoid muscle and scalene muscles.

The muscles involved in the inhalation process during running up the stairs are scalenes which help elevate the upper first and second ribs, the sternocleidomastoid muscle which helps to raise the sternum and the pectoralis minor.

Thus, Option-B is the correct answer.

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