Pulmonary Pharmacology: Asthma General disease characteristics increased tracheobronchial responsiveness to many stimuli physiological air passage narrowing paroxysmal dyspnea, coughing, wheezing, chest tightnessPulmonary Pharmacology: Asthma  General disease characteristics:  increased tracheobronchial responsiveness to many stimuli ↓  physiological air passage narrowing ↓  paroxysmal dyspnea, coughing, wheezing, chest tightness