The nurse instructs a client diagnosed with asthma on bronchodilator therapy. Which of the following would indicate that the client understands the information provided?
1. "The medication widens the airways because it stimulates the fight-or-flight response of the nervous system.".
2. "The medication widens the airways because it acts on the parasympathetic nervous system.".
3. "The medication widens the airways because it decreases the production of mucous that narrows the airways.".
4. "The medication widens the airways because it decreases the production of histamine that narrows the airways.".
1. "The medication widens the airways because it stimulates the fight-or-flight response of the nervous system.".
Rationale:
During the fight-or-flight response, beta2-adrenergic receptors of the sympathetic nervous system are stimulated, the bronchiolar smooth muscle relaxes, and bronchodilation occurs. Bronchodilators act on the sympathetic nervous system, not the parasympathetic nervous system. Bronchodilators do not decrease the production of mucous. Bronchodilators do not decrease the production of histamine.
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