title: Cellular basis of bronchial hyperresponsiveness. Control mechanisms: introduction.
mesh_terms: D000818:Animals; D001696:Biomechanical Phenomena; D001982:Bronchial Diseases / Q000473:pathology / Q000503:physiopathology*; D006801:Humans; D009424:Nervous System Physiological Phenomena; D010827:Physiology / Q000639:trends; D012130:Respiratory Hypersensitivity / Q000473:pathology / Q000503:physiopathology*; D012137:Respiratory System / Q000294:innervation