This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Basal electrical rhythm of GIT is  produced by 
Select and explain. 
A. Meissner plexus, B. Myentric plexus, C. Interstitial cells of cajal, D. Smooth muscle at cardiac end of stomach
C: Interstitial cells of cajal
Answer: C: Interstitial cells of cajal 
Explanation: Smooth muscle of GIT shows spontaneous fluctuation in membrane potential (between - 65mV and - 45mv) this is called  basal electrical rhythm. It is produced by interstitial cells of cajal.