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
Food causes reflex defecation- 
Select and explain. 
A. Enterogastric reflex, B. Defecation reflex, C. Gastrocolic reflex, D. Rectoanal reflex
C: Gastrocolic reflex
Answer: C: Gastrocolic reflex 
Explanation: Ans. is 'c' i.e., Gastrocolic reflex * From the cecum to the sigmoid colon mass movement (mass peristalsis or mass contraction) occurs. These movements usually occur only one to three times each day. A mass movement is a modified type of peristalsis.* Appearance of mass movements after a meal is facilitated by gastrocolic and duodenum reflexes. These reflexes result from the distension of the stomach and duodenum. The best example of gastrocolic reflex is seen in early infancy where defecation often follows a meal.