Not Now. Established in 1989, the Clearwater Volunteer Fire Department serves the Clearwater (Tennessee) community and surrounding area with support. 1,185 people like this and 1,166 people follow this.
Pathologic changes in chronic obstructive pulmonary disease (COPD) occur in the large (central) airways, the small (peripheral) bronchioles, and the lung parenchyma. Most cases of COPD are the result of exposure to noxious stimuli, most often cigarette smoke.
During an asthma attack, the airways become more inflamed than usual. They narrow as the muscles surrounding them constrict. Mucus produced by the inflammation fills the narrowed passageways. As a result, the flow of air is partially or completely blocked. Asthma affects the lung's larger and smaller airways.