Certified Travel Counselor (CTC) 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 445

Which of the following best describes the primary action of a bronchodilator?

Stimulates the sympathetic nervous system

The primary action of a bronchodilator is to relax the muscles surrounding the airways, which opens up the air passages in the lungs. This process is primarily achieved by stimulating the sympathetic nervous system, specifically through the activation of beta-2 adrenergic receptors. When these receptors are stimulated, it leads to bronchodilation, allowing for easier airflow and improved breathing, particularly beneficial in conditions like asthma and chronic obstructive pulmonary disease (COPD).

This mechanism emphasizes the importance of the sympathetic nervous system in respiratory function and the therapeutic effects of bronchodilators. These agents play a crucial role in providing relief from bronchospasm by mimicking the effects of adrenaline, which also acts on these adrenergic receptors to promote airway dilation.

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Deactivates the autonomic nervous system

Deactivates the sympathetic nervous system

Stimulates the autonomic nervous system

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