<prompt> Over-inflation of the lung is prevented by?Chemo-receptorHering- Breuer reflexSurfactantClara cells  <response>: Hering- Breuer reflex is reflex triggered to prevent over inflation of lung. Smooth muscles of the lung have pulmonary stretch receptors which respond to excessive stretching of the lung during large inspirations. The reflex limits the tidal volume while increasing the respiratory frequency Hering Breuer inflation reflex increases in duration of expiration produced by steady lung inflation. Hering breur deflation reflex is a decrease in the duration of expiration produced by steady lung deflation. Surfactant prevents the collapse of the lung. 