Pacemaker regulating the rate of respiration is
Pre-Botzinger complex initiates the respiratory rhythm, consists of six group of neurons that functions as "central pattern generator " for initiation of respiration. Located in the ventrolateral medulla. Ref: Ganong 25th ed/page 655
Pneumotaxic centre
Nucleus tractus solitarius
Apneustic centre
Pre-Botzinger complex
Nervous system