Chapter 6: Anatomy and Physiology of the Respiratory System 1. The vertebral column is comprised of how many cervical, thoracic, and lumbar vertebrae, respectively? A) 5 cervical, 10 thoracic, and 7 lumbar B) 5 cervical, 12 thoracic, and 7 lumbar C) 7 cervical, 10 thoracic, and 5 lumbar D) 7 cervical, 12 thoracic, and 5 lumbar 2. Which of the following types of vertebrae are relatively large in size? A) Cervical B) Lumbar C) Thoracic D) Sacral 3. The human body contains how many pairs of floating ribs? A) 2 B) 3 C) 4 D) 8 4. The main stem bronchi pierce the lung tissue at which of the following locations? A) Alveoli pulmonis B) Carina C) Hilum D) Suprasternal notch 5. Which of the following muscles is utilized for inspiration? A) Subclavius B) Quadratus lumborum C) Rectus abdominis D) Transversus thoracic 6. Which of the following muscles is utilized for expiration? A) Pectoralis minor B) Scalenus anterior C) Levator costarum brevis D) Transversus abdominis 7. Which of the following muscles has an insertion on the 2nd rib? A) Scalenus anterior B) Scalenus medius C) Scalenus posterior D) None of the above 8. Boyle's law is most accurately described by which of the following statements? A) If you increase the volume of a chamber, the pressure will also increase B) If you increase the volume of a chamber, the pressure will decrease C) If you decrease the volume of a chamber, the pressure will also decrease D) Air flows from low to high pressure 9. In order to maintain pleural linkage, the intrapleural pressure must be which of the following? A) Equal B) Positive C) Negative D) Nonexistent 10. During vocal activity, the approximate time ratio between inspiration and expiration changes to which of the following? A) 10% inspiration and 90% expiration B) 20% inspiration and 80% expiration C) 40% inspiration and 60% expiration D) 50% inspiration and 50% expiration 11. The pectoral girdle is comprised of the clavicle, scapula, and the ilium. A) True B) False 12. In all, 23 spinal nerves are involved in the motor innervation of the muscles of respiration. A) True B) False 13. The sternocleidomastoid is a muscle of expiration. A) True B) False 14. The atmospheric air that humans breathe is composed of about 60% oxygen. A) True B) False 15. In terms of respiration, the functional residual capacity is equal to the expiratory reserve volume and the residual volume. A) True B) False 16. The second cervical vertebra is commonly known as ___________. 17. A depression that runs along the length of the rib shaft is called the ___________. 18. The ___________ or true ribs have direct articulation with the vertebral column and the sternum. 19. The superior section of the sternum is known as the ___________. 20. The ___________ is a crater-like depression in the scapula, in which the head of the humerus rests. 21. The relatively large section of connective tissue at the center of the diaphragm is called the ___________. 22. The diaphragm is innervated by the ___________, which arises from the third through the fifth cervical spinal nerves. 23. If the pulmonary and atmospheric pressures are equivalent, the lungs can be said to be at ___________ volume. 24. A ___________ is an instrument used to measure respiratory lung capacity. 25. The pressure within the potential space between the costal and visceral pleurae is known as the ___________ pressure. Answer Key 1. D 2. B 3. A 4. C 5. A 6. D 7. C 8. B 9. C 10. A 11. B 12. A 13. B 14. B 15. A 16. axis 17. costal groove 18. vertebrosternal 19. manubrium 20. glenoid fossa 21. central tendon 22. phrenic nerve 23. resting 24. spirometer 25. intrapleural