Respiratory Lecture Test Questions Set 1 1. The term "respiration" in its most complete meaning is: a. breathing b. oxygen transport c. carbon dioxide transport d. cellular energy production e. all of the above 2. Oxidative phosphorylation without O 2 : a. oxyhemoglobin b. anoxia c. fermentation d. apnea e. residual respiration 3. The term respiration, in its most complete meaning, is: a. breathing b. gas exchanges c. gas transport d. cellular energy production e. all of the above 4. Which of the following is not a part of the respiratory system: a. nasopharynx b. uvula c. bronchioles d. parietal pleura e. intercostal muscles 5. Which phase of respiration is most important? -- that is, the one which is served by all of the others: a. gas exchange b. gas transport c. cellular respiration d. breathing e. segmentation 6. Which of the following is not a nasal function: a. warming b. humidification c. filtering d. deglutition e. olfaction 7. Which of the following would have a simple squamous lining: a. bronchiole b. alveolus c. bronchus d. larynx e. oropharynx
8. Blood transport of CO 2 from systemic capillaries to pulmonary capillaries is an act of: a. gas exchange b. gas transport c. breathing d. cellular respiration e. none of the above 9. During inspiration the thorax: a. increases laterally b. increases anterior to posterior c. decreases in all dimensions d. increases in all dimensions e. decreases laterally, but increases anterior to posterior 10. When the diaphragm is lowered the air pressure within the intra-thoracic cavity is: a. stationary b. lowered c. raised d. absent e. erratic, fluctuating unpredictably 11. At the peak of inspiration which of these would be the highest pressure: a. intra-alveolar b. atmospheric c. intra-thoracic e. none of the above apply, since they have nothing to do with inspiration 12. The lungs' internal moisture is kept from resisting expansion during inspiration and causing collapse during expiration by: a. surfactant b. dead space c. baroreceptors d. apneustic center e. intraabdominal pressure 13. A substance--surfactant--within the alveoli: a. keeps them moist b. raises surface tension so they can follow the thorax during inspiration c. lowers surface tension to permit them to expand during inspiration, and to prevent their collapse during expiration d. raises surface tension to prevent alveolar collapse during inspiration e. equalizes the PO 2 /PCO 2 juxtabarometric ratio--assuming temperature and photoperiod are unvarying--whenever one or the other approaches the square of the lesser, except when the lesser is below the square root of the reciprocal, provided the intra-thoracic/intraabdominal transdiaphragmatic antagonistic counter-pressure is more than one-half of the interalveolar capillary blood pressure (if Starling's Law of the heart is not broken, nor rigor mortis imminent.
14. Which of the following would be the most reasonable intra-thoracic pressure at the peak of a quiet inspiration: a. -8 mmhg b. +5 mmhg c. +8 mmhg d. -37 mmhg e. 0 mmhg 15. Which of the following would be the most reasonable intra-alveolar pressure at the peak of a maximum forced inspiration: a. 0 mmhg b. +35 mmhg c. -35 mmhg d. -3 mmhg e. +3 mmhg 16. At the peak of inspiration which of these would be the lowest pressure: a. intra-alveolar b. atmospheric c. intra-thoracic e. none of the above apply, since they have nothing to do with inspiration 17. Why do the lungs expand during inspiration: a. air enters from the outside b. intra-thoracic pressure rises around them c. intra-thoracic pressure drops around them d. relaxation of inter-alveolar smooth muscle e. decrease in surface tension of serous fluid between the pleural membranes 18. The degree of pulmonary elasticity, which determines the amount of stretch permitted, is: a. alveolar ventilation b. orthopnea c. lung compliance d. partial pressure e. surface tension 19. During inspiration, alveoli expand due to which of the following: a. elastic recoil b. air entering them c. intraabdominal pressure d. a drop in atmospheric pressure e. a drop in the surrounding intra-thoracic pressure 20. Which of the following is not a cause of inspiration: a. thoracic expansion b. diaphragm contraction c. external intercostal relaxation d. decreased intra-thoracic pressure e. decreased intra-alveolar pressure
21. Surfactant is not a(n): a. aide in preventing complete collapse of the lungs b. factor in increasing surface tension c. factor in decreasing surface tension d. factor in expiration e. wetting agent 22. Expiration is: a. always passive b. passive during normal, quiet breathing c. always active d. active during normal, quiet breathing e. neither passive nor active 23. During expiration the thorax: a. increases laterally b. increases anterior to posterior c. increases in all dimensions d. decreases laterally, but increases anterior to posterior e. decreases in all dimensions 24. At the peak of expiration which of the following would be the lowest: a. intra-alveolar pressure b. atmospheric pressure c. intra-thoracic pressure e. none of the above apply, since they have nothing to do with expiration 25. Of the following, the greatest pressure is: a. atmospheric b. intra-alveolar during inspiration c. intra-alveolar during expiration d. intra-thoracic during inspiration e. intra-thoracic during expiration 26. At the peak of expiration which of the following would be the highest: a. intra-alveolar pressure b. intra-thoracic pressure c. atmospheric pressure e. none of the above, since they have nothing to do with expiration 27. Which of the following is actively involved in a quiet expiration: a. diaphragm b. rectus abdominis c. internal intercostal d. external intercostal e. none of the above
28. Which muscle combination would occur to permit blowing up a balloon: a. diaphragm and external intercostal contraction b. diaphragm and external intercostal relaxation c. diaphragm and internal intercostal contraction d. rectus abdominis and internal intercostal contraction e. external and internal intercostal contraction 29. If the intra-alveolar pressure is +13 mmhg then the intra-thoracic pressure will be: a. + 8 b. 8 c. + 13 d. 0 e. + 18 30. If the intra-thoracic pressure is -2 then the intra-alveolar pressure would be: a. 0 b. 7 c. + 3 d. + 40 e. 40 31. If the intra-thoracic pressure is +20 mmhg then the intra-alveolar pressure would be: a. 12 b. + 28 c. + 25 d. + 15 e. + 20 32. If the intra-alveolar pressure is -17 mmhg then the intra-thoracic pressure would be: a. 17 b. + 17 c. 12 d. 22 e. 0 33. Which of the following would involve (or include) forced expiration: a. hyperventilation b. sneezing c. coughing d. sighing e. all of the above 34. Recoil of the diaphragm, thoracic compression and passive movements indicate: a. quiet inspiration b. forced inspiration c. forced expiration d. quiet expiration e. none of the above 35. If the intra-alveolar pressure is + 19 then the intra-thoracic pressure will be: a. + 14 b. + 24
c. + 19 d. 19 e. + 29 BI-205 Respiratory Set 1