What is a prominent symptom of asthma?

• A. Excessive lung capacity
• B. Wheezing or stridor during expiration
• C. Unrestricted airflow during breathing
• D. Normal oxygen levels without any discomfort

Answer: (B)

Wheezing or stridor during expiration is a prominent symptom of asthma due to the narrowing of the airways, which results in difficulty with airflow, particularly when exhaling. Asthma involves bronchial inflammation and constriction, leading to the characteristic high-pitched whistle-like sounds during breathing known as wheezing. This occurs because the muscles around the airways tighten, and the airway lining swells, making it harder for air to flow smoothly, especially during expiration.

In contrast, excessive lung capacity, unrestricted airflow, and normal oxygen levels without discomfort do not align with the asthmatic condition. Individuals experiencing asthma typically do not have unrestricted airflow; in fact, the opposite is true, as they face resistance in their airways resulting in restricted airflow. Similarly, normal oxygen levels are not typically maintained during an asthma attack, as limited airflow can lead to decreased oxygen saturation and discomfort.