HLTH 335 Lecture 26: HLTH 335 - Tisone - 26
26 Oct 2018
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Human diseases - hlth 335 - exam 2 notes. Characterized by hypersensitivity to various allergens like dust, mold, pollen, animal dander, and various foods. 80% of children with asthma and 50% of adult asthmatics have allergies. The allergens trigger constriction of smooth muscle in walls of bronchi, narrowing lumen of tubes. Spasm is sustained contraction of musculature, making breathing (particularly expiration) very difficult. Sound results from air passing through narrowed tubes. , are frequently associated with an asthma attack. There is no cure to identify triggers. For asthma, but attacks may become less severe with age, important. Figure 8-6 = normal bronchiole (a) and one constricted in asthma attack (b). Medication and allergy shots can reduce the incidence or severity of asthma attacks. To counteract an ongoing attack, substances that dilate the bronchi are effective. Cortisone-like drugs and antihistamines are sometimes used, but these carry a. A crippling and debilitating (weakening) disease with chronic lung obstruction and destruction.
