Question
They branch from the trachea at the carina. A) terminal bronchioles B) tertiary bronchi C) alveolar ducts D) secondary bronchi E) primary bronchi The respiratory epithelium of the conducting airways consists of A) psoudostratified ciliated columnar epithelium. B) ciliated squamous epithelium. C) simple squamous epithelium. D) moist cuboidal epithelium. E) surfactant cells. Pulmonary ventilation refers to the A) movement of dissolved gases from the alveoli to the blood. B) utilization of oxygen. C) movement of air into and out of the lungs. D) movement of dissolved gases from the blood to the interstitial space. E) movement of dissolved gases from the Interstitial space to the cells. The Hering-Breuer reflex A) functions to increase ventilation with changes in blood pressure. B) alters pulmonary ventilation when the PO_2 changes. C) alters pulmonary ventilation when the PCO_2 changes. D) is an important aspect of normal, quiet breathing. E) protects the lungs from damage due to overinflation. During a choking episode, most foreign objects are lodged in the____ bronchus due to its larger diameter and steeper angle. A) right secondary B) right primary C) left secondary D) left primary E) A and B are equal The most superior portion of the lung is termed the A) cardiac notch. B) base. C) epipleurium. D) apex. E) hilus. The C shape of the tracheal cartilages is important because A) large masses of food can pass through the esophagus during swallowing. B) it facilitates turning of the head. C) large masses of air can pass through the trachea. D) A. B, and C E) A and B only
Explanation / Answer
7. ANS: E (Primary bronchi)
Primary bronchi are branched from the trachea at the carina. The primary bronchi are extra pulmonary bronchi and the secondary bronchi are to intrapulmonary bronchi.
8. ANS: A (pseudo stratified ciliated columnar epithelium)
9. ANS: C (movement of air into and out of the lungs.).
The phenomenon of pulmonary ventilation refers to the movement of air into and out of the lungs.
10. ANS: E (protects lungs from over inflation)
The Hering-Breuer reflex can protects the lungs from damage due to over inflation.
11. ANS: B (Right primary bronchus)
During the process of choking episode, most foreign objects are lodged in the Right primary bronchus.
12. ANS: D (Apex)
The word apex means top and the word base means bottom.
13. ANS: D (large masses of food can pass through the esophagus during swallowing.)
The C shape of the tracheal cartilages is important because large masses of food can pass through the esophagus during swallowing.
