Bronchial hyperreactivity is generally considered as an abnormally high sensitivity of the airways to physical, chemical, pharmacological and biological stimuli whose main epiphenomenon is represented by an abnormal response expressed by a contraction of airway smooth muscle. The occurrence of this response may also be accompanied by reactions involving mucus secretion, vasomotor tone and breathing pattern, although broncho-constriction is always the prevalent feature.
KeywordsAirway Smooth Muscle Occupational Asthma Bronchial Reactivity Airway Response Bronchial Hyperreactivity
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