Beta-2 blockers primarily target which part of the body?

Beta-2 blockers primarily target the lungs and, to a lesser extent, the eyes. The primary focus of beta-2 adrenergic receptors is on smooth muscles found in the bronchial passages, where they mediate bronchodilation. This characteristic makes beta-2 agonists useful in treating conditions like asthma and COPD, as they help relax the airway muscles, facilitating easier breathing.

In addition to their role in the respiratory system, beta-2 receptors influence other areas such as blood vessels and the uterus during pregnancy; however, their action is most prominent in the lungs. Unlike beta-1 blockers, which are primarily associated with the heart and can decrease heart rate and myocardial contractility, beta-2 blockers lead to vasodilation and bronchial dilation. Therefore, option B is centered around the correct areas where beta-2 adrenergic activity is most significant.