Receptive relaxation During chewing and swallowingfood the stimulation of food to the receptors in mouth, pharynx, and esophagus reflexly causes the smooth muscle of the fundus and body of the stomach to relax, This process allows the stomach to accommodate a large amounts of food and fluid 1010 Receptive relaxation During chewing and swallowing food, the stimulation of food to the receptors in mouth, pharynx, and esophagus reflexly causes the smooth muscle of the fundus and body of the stomach to relax, This process allows the stomach to accommodate a large amounts of food and fluid