Reflex control of airways calibre.
D000403:Airway Resistance; D006801:Humans; D008171:Lung Diseases / Q000503:physiopathology; D009119:Muscle Contraction; D009130:Muscle, Smooth / Q000502:physiology*; D012018:Reflex; D012143:Respiratory Physiological Phenomena; D012137:Respiratory System / Q000294:innervation; D013564:Sympathetic Nervous System / Q000502:physiology; D014630:Vagus Nerve / Q000502:physiology