The nurse teaches a medication class on bronchodilators for clients with asthma. The nurse evaluates that learning has occurred when the clients make which statement?
1. "The medication widens the airways because it decreases the production of mucous that narrows them."
2. "The medication widens the airways because it decreases the production of histamine that narrows them."
3. "The medication widens the airways because it acts on the parasympathetic nervous system."
4. "The medication widens the airways because it stimulates the fight-or-flight response of the nervous system."
Correct Answer: 4
Rationale 1: Bronchodilators do not decrease the production of mucous.
Rationale 2: Bronchodilators do not decrease the production of histamine.
Rationale 3: Bronchodilators act on the sympathetic nervous system, not the parasympathetic nervous system.
Rationale 4: During the fight-or-flight response, beta2-adrenergic receptors of the sympathetic nervous system are stimulated, the bronchiolar smooth muscle relaxes, and bronchodilation occurs.
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