CHAPTER REVIEW Knowledge and Comprehension 10. 1. The diffusion of O, across the
ID: 3472511 • Letter: C
Question
CHAPTER REVIEW Knowledge and Comprehension 10. 1. The diffusion of O, across the respiratory membrane is increased by a. increased trachea length. b. increased alveoli ventilation. c. decreased alveoli ventilation. d. decreased respiratory membrane area. e. increased respiratory membrane thickness. The airways are protected against airborne hazards by a. nasal hair b. c. mucous coaring d. ciliated epithelial cells lining the airway e, all of the above. 12. 3. Gas exchange take places in the d. terminal bronchioles e. respiratory bronchioles a. alveoli. b. nasal cavity c. secondary bronchi. 13. 4. During quiet exhalation a. the rib cage is raised. b. the diaphragm relaxes c. the diaphragm contracts d. the scalene muscles contract. e. the bronchi are vasoconstricted. 5. Plasma CO, levels affect blood pH 14. a. because CO, is complexed to heme. b. because CO, is converted to carbonic acid c. because CO, absorbs acid produced by tissues. d. because CO, is absorbed by buffers in the blood. e. because CO, produces a strong base in the blood 6. Oxygen diffuses from inside the palmonary capillary to inside the alveoli because 15. a. it follows CO, out of the body b. it is complexed to heme inside the alveoli. c. it is at a greater concentration in the capillaries than in the alveoli. d. it is at a greater concentration in the alveoli than in the capillaries. e, oxygen could never diffuse from the pulmonary capillaries to alveolar space under any 16 7. Which of the following anatomical structures connect bronchi to the pharynx? Bronc a. Bronchioles b. Esophagus c. Larynx 17 d. Nose e. Trachea 8. Air enter the lungs during inhalation a. because the bronchioles vasodilate during each inhalation. b. because intrapleural pressure exceeds the elastic recoil of the lungs. c. because the intrapleural pressure equals the elastic recoil of the lungs. d. because air pressure inside the alveoli is less than atmospheric air pressure. e. because air pressure inside the alveoli is greater than atmospheric air pressure. 9. Hemoglobin affinity for O, is affected by many things. Which of the following 9. Hemoglobin afinity for O, is affected by many things. Which of the following would increase the saturation curve to the left)? a. Increased CO b. Increased acidity c. Increased temperature wing would increase the afo d. Decreased temperature e. a, b, and c are correct 872 Chapter 22-The Respiratory SystemExplanation / Answer
1. Answer is B. Increased alveoli ventilation. As diffusion of oxygen occurs through alveoli, increased alveolar ventilation, increase the oxygen diffusion
2. Answer is e. All the options correct.
3. Answer is a. Alveoli. As the alveolar membrane thickness is very low, and these are ends of lungs, gases exchange takes place here with blood.
4' answer is b
4.