This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Physiology
Initiation of basic electrical Rhythm of intestine is by? 
Select and explain. 
A. Interstitial cells of Cajal, B. Entero-chromaffin cells, C. Auerbach plexus, D. Meissner plexus
A: Interstitial cells of Cajal
Answer: A: Interstitial cells of Cajal 
Explanation: Ans. A Interstitial cells of CajalRef: Ganong, 25th ed. pg. 496The basal electrical rhythm is initiated by interstitial cells of Cajal which are stellate mesenchymal parenchymal cells that send long multiple branched processes into the intestinal smooth muscle.