Table 1.
Major classes of pulmonary receptors and their reflex effects
| Receptor Type | Reflex Effects |
|---|---|
| SAR | Breuer-Hering reflex: inspiratory termination, expiratory facilitation Enhancement of inspiratory effort Bronchodilation Tachycardia |
| RAR | Cough Broncho- and laryngoconstriction Augmented breath/gasp (on stimulation of RAR by a large, rapid lung inflation) Irregular, augmented inspiration and shortened expiration (on maintained airway deflation or inhalation of irritants) Airway mucus secretion |
| Slowly adapting deflation receptors (present in rats and rabbits; some may be classified as RARs based on lung deflation tests) |
Unknown |
| Bronchopulmonary C fibers | Rapid, shallow breathing Apnea (on synchronous chemical stimulation) Broncho- and laryngoconstriction Airway mucus secretion Vasodilatation (pulmonary C fibers only) Bradycardia |
SAR, slowly adapting stretch receptor; RAR, rapidly adapting stretch receptor.