What occurs during bronchospasm?

What occurs during bronchospasm?

• A. Expansion of the bronchioles
• B. Constriction of smooth muscle walls of the bronchioles
• C. Increase in airway diameter
• D. Inflammation of lung tissue

Answer: (B)

During bronchospasm, the primary event is the constriction of the smooth muscle walls of the bronchioles. This contraction causes the airways to become narrower, which can lead to difficulty breathing, wheezing, and a feeling of tightness in the chest. The smooth muscle lining the bronchioles tightens, reducing the diameter of the airways and increasing resistance to airflow. This constriction can occur due to various triggers, such as allergens, respiratory infections, or irritants, and is commonly associated with conditions like asthma and chronic obstructive pulmonary disease (COPD). Understanding the mechanism of bronchospasm is crucial for recognizing symptoms and administering appropriate treatments, like bronchodilators, which work to relax the smooth muscle and open the airways.

During bronchospasm, the primary event is the constriction of the smooth muscle walls of the bronchioles. This contraction causes the airways to become narrower, which can lead to difficulty breathing, wheezing, and a feeling of tightness in the chest. The smooth muscle lining the bronchioles tightens, reducing the diameter of the airways and increasing resistance to airflow.

This constriction can occur due to various triggers, such as allergens, respiratory infections, or irritants, and is commonly associated with conditions like asthma and chronic obstructive pulmonary disease (COPD). Understanding the mechanism of bronchospasm is crucial for recognizing symptoms and administering appropriate treatments, like bronchodilators, which work to relax the smooth muscle and open the airways.