Which term describes a respiratory condition caused by narrowing of airway passages, causing breathing difficulties?

• A. Apex
• B. Asthma
• C. Airborne Pathogens
• D. Ampere

Answer: (B)

This item tests understanding of a respiratory condition defined by reversible narrowing of the airways that makes breathing difficult. Asthma is a chronic inflammatory disease of the airways in which the bronchioles become inflamed and hyperreactive, leading to bronchoconstriction, edema, and mucus production. This combination narrows the airways episodically, causing wheezing, coughing, shortness of breath, and chest tightness, with episodes that are typically reversible either on their own or with treatment such as inhaled bronchodilators and anti-inflammatory medicines. The narrowing is a hallmark feature, and triggers like allergens, exercise, cold air, or irritants can provoke symptoms. The other terms don’t describe a respiratory condition with airway narrowing: apex refers to a top point, airborne pathogens are infectious agents that can cause respiratory illness but not the mechanism of airway narrowing, and ampere is a unit of electric current.