Final answer:
Anticholinergic bronchodilators trigger the relaxation of bronchial smooth muscle, resulting in bronchodilation by blocking the muscarinic acetylcholine receptors that mediate bronchoconstriction.
Step-by-step explanation:
The action triggered by anticholinergic bronchodilators is the relaxation of bronchial smooth muscle, leading to bronchodilation. These drugs, such as atropine, act as antagonists to muscarinic acetylcholine receptors, blocking the parasympathetic effects that would otherwise cause bronchoconstriction. Anticholinergics thus suppress the parasympathetic nervous system, allowing for increased airflow through the lungs, which is beneficial in conditions like asthma or COPD where bronchoconstriction is a problem.
Anticholinergic bronchodilators trigger the action of bronchodilation. These medications work by blocking the binding of acetylcholine to muscarinic receptors, which leads to smooth muscle relaxation in the bronchioles. As a result, the airways widen, allowing for an increased flow of air in and out of the lungs.