Posted by mgf127 on August 18, 2011 at 23:44:27:
In Reply to: Questions for the Lungs and Anterior/Middle Mediastinum posted by lae2 on August 17, 2011 at 14:37:00:
Answers
True/False - August 18, 2010
1. The level of the T4 vertebra marks the location of the tracheal bifurcation.
True
2. The deviation of the heart to left side provides a mneumonic for knowing that the left bronchus is longer and more transverse than the right bronchus.
True
3. The horizontal fissure is unique to the left lung.
False—it is unique to the right lung
4. The lingula provides the inferior border of the cardiac notch.
True
5. Posteriorly, the oblique fissure is at the level of T3 vertebra, mid-axillary at 5th rib, mid-clavicular at 6th rib.
True
6. Horizontal fissure marks the 7th rib.
False—superior to the 7th rib
7. The hilum of the lung is cradles by the suprapleural membrane.
False—the apex of each lung is covered in suprapleural membrane
8. The pulmonary ligament is formed by pleural reflections beginning at the hilum of the lung and extending inferior toward the diaphragmatic surface.
True
9. The segmental bronchi are known as tertiary bronchi.
True
10. Each bronchopulmonary segment has a segmental pulmonary artery and a lobar bronchus.
True
11. Lung tissue proper is not perfused by either the pulmonary artery or vein.
True
12. The upper 7 ribs mediate an increase in the anterior/posterior dimension of the thorax on inspiration.
True
13. The lower 5 ribs mediate an increase in the transverse dimension of the thorax on inspiration.
True—not sure about false floating ribs
14. The pump handle movement of respiration refers the movements of the sternum whereas the bucket handle movement refers to movements of the costal margin.
False—bucket handle movement refers to the lateral movement of the shaft of the ribs
15. The vertical dimension of the thorax increases when the diaphragm contracts.
True
16. The costotransverse joints allow rotation (cup shaped) for the upper 7 ribs and sliding (planar) for the lower 5 ribs.
True—unclear on reasoning? Does the costotransverse joint supplement the joint with the vertebral body?
17. The costochondral and sternochondral joints participate in the movements of respiration.
False—sternochondral are synovial joints are participate in the movements of respiration whereas costochondral joints are immovable
18. The lungs receive oxygenated blood from the pulmonary arteries
False
19. Relaxed breathing is primarily mediated by the upper 7 ribs.
False—relaxed breathing is primarly diaphragmatic
20. Cup shaped articulations of the costotransverse joint permit transverse movement of the lower ribs.
False—the costovertebral joints are more cupshaped
21. The arterial supply to the left lung is derived directly from the aortic arch
True—the bronchial artery derives directly from the aorta