9. A, Explain the significance and limitations of a positive tuberculin test.
9. B. Explain the conditions under which tuberculosis may be contagious.
9. C. What measures can be taken by health professionals to minimize the spread of infection.
10. A. Explain how obstruction develops with chronic bronchitis.
10. B. Explain how acute asthma causes air trapping or atelectasis.
10. C. How does hypoxia and respiratory alkalosis develop in the early stages of an asthma attack?
10. D. Explain why serum pH is lowered when an asthma attack persists.
11. A. Explain why the anteroposterior diameter of the chest is increased in a patient with emphysema.
11. B. Explain why hypercapnia may be a major problem in patients with emphysema.
11. C. Explain how each of the following develops in patients with emphysema: (1) cor pulmonale, (2) secondary polycythemia.
16. A. Explain why pulmonary edema causes severe hypoxia.
16. B. Trace the path of a pulmonary embolus resulting from thrombophlebitus.
16. C. Compare the effects on respiration of a very small embolus and of a very large one.