The pacemaker of intestine is:: (A) Interstitial cells of cajal, (B) Smooth muscle, (C) Collagen fiber, (D) All
Answer is A. The pacemaker of intestine is Interstitial cells of cajal. They in association with smooth muscle cells act as pacemakers Ref:Guyton and Hall textbook of medical physiology 12th edition,page number:395,396