What is the term for the phenomenon where airway narrowing occurs after exposure to an asthma trigger?

What is the term for the phenomenon where airway narrowing occurs after exposure to an asthma trigger?

• A. Immediate response
• B. Late-phase response
• C. Acute response
• D. Chronic response

Answer: (B)

The phenomenon where airway narrowing occurs after exposure to an asthma trigger and is termed as the late-phase response. This response typically occurs several hours after the initial exposure to the trigger and involves a complex interplay of inflammatory mediators and immune cells. During the late-phase response, there is often a resurgence of bronchoconstriction that may lead to increased airway inflammation and hyperreactivity, making the airways more susceptible to further narrowing. In contrast, the immediate response is characterized by quick bronchoconstriction that occurs within minutes of exposure to an allergen or irritant. The acute response is generally associated with this rapid reaction, while chronic response refers to long-term changes in the airways due to ongoing inflammation and remodeling, rather than an immediate event following exposure. The clarity in understanding the timing and mechanisms behind the late-phase response is crucial for managing asthma effectively, as it can inform treatment strategies aimed at preventing the persistence of symptoms.

The phenomenon where airway narrowing occurs after exposure to an asthma trigger and is termed as the late-phase response. This response typically occurs several hours after the initial exposure to the trigger and involves a complex interplay of inflammatory mediators and immune cells. During the late-phase response, there is often a resurgence of bronchoconstriction that may lead to increased airway inflammation and hyperreactivity, making the airways more susceptible to further narrowing.

In contrast, the immediate response is characterized by quick bronchoconstriction that occurs within minutes of exposure to an allergen or irritant. The acute response is generally associated with this rapid reaction, while chronic response refers to long-term changes in the airways due to ongoing inflammation and remodeling, rather than an immediate event following exposure. The clarity in understanding the timing and mechanisms behind the late-phase response is crucial for managing asthma effectively, as it can inform treatment strategies aimed at preventing the persistence of symptoms.