NREMT Paramedic Practice

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Prepare for the NREMT Paramedic Exam with comprehensive quizzes that cover essential topics, including patient assessment, treatment protocols, and emergency medical care. With multiple-choice questions and detailed explanations, you'll be ready to excel in your certification test.

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Which body system is primarily affected by a Beta 2 blocker?

Cardiovascular system
Respiratory system
Nervous system
Digestive system

The correct answer is: Respiratory system

Beta 2 blockers primarily target the beta-2 adrenergic receptors, which are predominantly found in the smooth muscle of the respiratory tract. When these receptors are activated, they facilitate bronchodilation, allowing for easier airflow in and out of the lungs. Therefore, medications that act as beta-2 blockers are often used in the treatment of respiratory conditions such as asthma or chronic obstructive pulmonary disease (COPD). While beta-1 receptors primarily affect the cardiovascular system by influencing heart rate and contractility, in the context of beta-2 blockers, the respiratory system is the primary target for their action. Beta-2 receptors also play a role in other systems, including the nervous and digestive systems, but their most significant impact is observed in the respiratory system, making it the correct answer in this scenario.