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
Migrating motility complex 
Select and explain. 
A. Occurs upon arrival of food in the stomach, B. Begins in the lower pa of the small intestine, C. Are initiated by pacemaker cells in the intestine, D. Occurs at a rate of 5 cms per minute from the stomach
D: Occurs at a rate of 5 cms per minute from the stomach
Answer: D: Occurs at a rate of 5 cms per minute from the stomach 
Explanation: Migrating motility complex refers to the peristaltic wave that begins in esophagus & travels through the entire GIT. -The hormone motilin, released from the endocrine cells within the epithelium of small intestine initiates MMC. -MMC wave travels at a regular rate of 5cm/min. -MMC is abolished immediately after the entry of food into the stomach. Ref: guyton and hall textbook of medical physiology 12 edition page number:443,444,445