this distention activates a parasympathetic reflex via the medulla oblongata and also has direct stimulatory effect on the gastric glands
the result is continued secretion of HCL and pepsin
in the intestinal phase of gastric secretion ,chyme has entered the duodenum so gastric secretion is no longer needed
when the chyme contain lipids from the digestion of fats or contains enough HCl to bring its pH below 2 gastric secretion is inhibited