define and describe asthma
due to hypersensitivity (allergies)
increased bronchoconstriction and inflammation
define and describe bronchitis
Can be acute or chronic
inflammation often related to infection and irritation
define and describe emphysema
destruction of alveolar walls
decreased surface area and ability to exhale
Acquired due to environmental conditions
Define and describe cystic fibrosis
genetic disorder
decreased number of Cl- transport channels
causes thickened mucus production and decreased gas exchange
patients have increased infections