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Airway resistance can also change over time. During an asthma attack the airways constrict causing an increase in airway resistance. Airway resistance can also vary between inspiration and expiration: In emphysema there is destruction of the elastic tissue of the lungs which help hold the small airways open. Therefore, during expiration ...
The airways narrow and produce excess mucus, making it difficult to breathe. In essence, asthma is the result of an immune response in the bronchial airways. [3] The airways of asthma patients are "hypersensitive" to certain triggers, also known as stimuli (see below).
Smoker's macrophages affect the elastic fibers in the mucus layer of the airways, tightening the lumen and causing asthma. Symptoms of asthma include wheezing, coughing, and chest discomfort. To ameliorate the situation, drugs that either suppress the inflammatory response or relaxes the airway will be administrated, so air can pass through.
Asthma is a common long-term inflammatory disease of the airways of the lungs. [4] Asthma occurs when allergens , pollen , dust, or other particles, are inhaled into the lungs, causing the bronchioles to constrict and produce mucus, which then restricts oxygen flow to the alveoli .
Bronchoconstriction is defined as the narrowing of the airways in the lungs (bronchi and bronchioles). Air flow in air passages can get restricted in three ways: [ 3 ] a spasmodic state of the smooth muscles in bronchi and bronchioles
Obstructive lung disease is a category of respiratory disease characterized by airway obstruction. Many obstructive diseases of the lung result from narrowing (obstruction) of the smaller bronchi and larger bronchioles, often because of excessive contraction of the smooth muscle itself.
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