<prompt> About Heads paradoxical reflex, which of the following fact is TRUE?It plays an impoant role in normal respirationIt is mediated by tracheobronchial-stretch receptorsIt is stimulated by hyperinflation of lungsIt inhibits respiration  <response>: Heads paradoxical reflex: Inflation of lungs, under ceain conditions, enhances inspiratory activity. Since inflation induces fuher inflation of lungs, the reflex is considered paradoxical. The vagal fibers mediating Heads paradoxical reflex carry information originating in receptors present in lungs. This reflex has a role in initiation of respiration at bih. Ref: Understanding Medical Physiology By R.L. Bijlani, M.D., RL Bijlani MD SM DSc Hon Causa FAMS, S. Manjunatha, M.D., 2010, Page 245. 