21- Drug Therapy for Asthma and other Respiratory Problems
1. Which type of problem narrows the airways by tightening bronchial smooth muscle?
- Chronic bronchitis
- D. Bronchoconstriction
- The alveoli are not airways, they are air sacs. Emphysema is a disease of flabby airways, not of bronchoconstriction. With chronic bronchitis, the airways are narrowed with swollen mucous membranes not by constriction of the muscles in the airways.DIF: Cognitive Level: Remembering REF: p. 341
2. Which part of the airway is affected by excessive mucus?
- Smooth muscle
- Mucous membrane
- A. Lumen
- The center of the airway, known as the lumen, is partially or completely plugged with excessive mucus (produced by cells in the mucous membranes). Cartilage and smooth muscle do not come into contact with mucus and are not affected by it.DIF: Cognitive Level: Remembering REF: p. 341
3. Which part of the respiratory system is most affected by asthma?
- Asthma is a chronic disease characterized by intermittent changes in the lower and smaller airways, not the alveoli or the cartilage. The trachea, although it is an airway is too large to be affected by asthma.DIF: Cognitive Level: Remembering REF: p. 340
4. Which type of asthma problem is helped most by bronchodilator drugs?
- Thick mucus
- Mucosal swelling
- Large, flabby alveoli
- C. Bronchoconstriction
- Bronchodilators relax bronchiolar smooth muscle and widen the airways. They do nothing to help flabby alveoli and do nothing to reduce inflammation. Inflammation is responsible for mucus production and mucosal swelling.DIF: Cognitive Level: Remembering REF: p. 342