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
Pacemaker cells of the GIT can be seen in 
Select and explain. 
A. Cardiac end of stomach, B. Long muscle of small intestine, C. Pyloric end of stomach, D. Fundus of stomach
C: Pyloric end of stomach
Answer: C: Pyloric end of stomach 
Explanation: Pacemaker cells of GIT are absent in esophagus and proximal stomach.
Distal stomach & small intestine- Pacemaker cells present in outer circular muscle layer near myenteric plexus.
Colon- Submucosal border of circular muscle layer.