Which option is NOT a mechanism by which bronchodilators improve COPD symptoms?

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Multiple Choice

Which option is NOT a mechanism by which bronchodilators improve COPD symptoms?

Explanation:
Bronchodilators help COPD symptoms by relaxing airway smooth muscle, which widens the airways, lowers airway resistance, and improves airflow. This increase in caliber translates to a higher FEV1 and better ventilation, meaning gas exchange improves and dyspnea can lessen. They do not narrow the airways; in fact, narrowing would worsen airflow. So the statement that bronchodilators narrow the airways is not a mechanism by which they improve symptoms.

Bronchodilators help COPD symptoms by relaxing airway smooth muscle, which widens the airways, lowers airway resistance, and improves airflow. This increase in caliber translates to a higher FEV1 and better ventilation, meaning gas exchange improves and dyspnea can lessen. They do not narrow the airways; in fact, narrowing would worsen airflow. So the statement that bronchodilators narrow the airways is not a mechanism by which they improve symptoms.

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