In infants, defecation often following meal. The cause of colonic contraction in this situation is: (A) Gastroileal reflex, (B) Enterogastric reflex, (C) Increased circulation levels of CCK, (D) Gastrocolic - reflex
Answer is D. Ans. (d) Gastrocolic - reflex(Ref: Ganong, 25th ed/p.504)Distension of the stomach by food - causes contractions of the rectum leading to defecation. This reflex is called gastrocolic reflex