ACSM
010-111 · Question #23
010-111 Question #23: Real Exam Question with Answer & Explanation
The correct answer is A. clavicle. The clavicle is the only listed bone with a direct articular connection to the thoracic cage, allowing it to move with the chest wall during both inspiration and expiration.
Question
Which of the following bones facilitate movement of the chest during both inspiration and expiration?
Options
- Aclavicle
- Bscapula
- Ccarpal
- Dscalene
Explanation
The clavicle is the only listed bone with a direct articular connection to the thoracic cage, allowing it to move with the chest wall during both inspiration and expiration.
Common mistakes.
- B. The scapula has no direct bony articulation with the ribcage and moves primarily in response to shoulder girdle activity rather than facilitating the mechanical expansion and compression of the chest during breathing.
- C. The carpal bones are located in the wrist and have no anatomical connection to the thoracic cage or respiratory mechanics whatsoever.
- D. The scalenes are a group of skeletal muscles of the lateral neck that act as accessory respiratory muscles by elevating the upper ribs during forced inspiration; they are not bones and therefore cannot be the correct answer to a question about bones.
Concept tested. Bony structures involved in thoracic respiratory mechanics
Reference. https://www.kenhub.com/en/library/anatomy/the-clavicle
Community Discussion
No community discussion yet for this question.