Final answer:
The intestinal phase of gastric regulation is facilitated by events that occur in the small intestine, where chyme stimulates the release of hormones and receptors that initiate inhibitory neural reflexes. The release of intestinal gastrin by intestinal mucosal cells stimulates gastric juice secretion, but the enterogastric reflex inhibits gastric secretion and regulates the flow of chyme.
Step-by-step explanation:
The intestinal phase of gastric regulation is facilitated by events that occur in the small intestine, where chyme stimulates the release of hormones and receptors that initiate inhibitory neural reflexes.
When chyme enters the small intestine, it triggers hormonal and neural events that coordinate the activities of the intestinal tract, pancreas, liver, and gallbladder. The release of intestinal gastrin by intestinal mucosal cells further stimulates gastric juice secretion. However, the enterogastric reflex, initiated by the distension of the intestine with chyme, inhibits gastric secretion and closes the pyloric sphincter to regulate the flow of chyme.