Anesthesia Knowledge Test 24 (AKT-24) Practice

The involvement of receptors in bronchoconstriction and dilation centers primarily on the beta-adrenergic receptors, particularly the beta-2 receptors. These receptors are responsible for smooth muscle relaxation in the bronchial passages, leading to bronchial dilation. Activation of beta-2 receptors by agonists can effectively relieve symptoms of bronchoconstriction, making them crucial in the management of conditions like asthma and chronic obstructive pulmonary disease (COPD).

While other receptors, such as the M3 muscarinic receptors, also play a role in bronchial tone by mediating bronchoconstriction, the focus on beta receptors highlights their therapeutic importance in promoting airway relaxation. Understanding the actions of these receptors is essential for effective anesthetic management and the treatment of respiratory conditions, as agonists targeting beta-2 receptors are commonly used in clinical settings.

In contrast, M1 receptors and alpha receptors are less directly involved in the processes of bronchoconstriction and dilation, making them less significant in this specific context. Thus, beta receptors are clearly recognized for their role in inducing smooth muscle dilation in the airways.