<prompt> Food causes reflex defecation?Enterogastric reflexDefecation reflexGastrocolic reflexRectoanal reflex  <response>: Ans. isci.e., Gastrocolic reflexRel Guyton llthe p. 771Appearance of mass movements after a rneal 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. 