<prompt> Herring Breuer reflex is an increase in ?Duration of inspirationDuration of expirationDepth of inspirationDepth of expiration  <response>: Ans. is b i.e., Duration of expirationThe Hering-Breuer inflation reflex is an increase in the duration of expiration produced by steady lung inflation, and the Hering-Breuer deflation reflex is a decrease in the duration of expiration produced by marked deflation of the lung. 