Answer :
Final answer:
Pancreatic juice secretion in the gastric phase is controlled by the entry of acidic chyme into the duodenum. This stimulates the release of secretin and CCK, which in turn regulate the release of bicarbonate-rich and enzyme-rich pancreatic juice.
Explanation:
The secretion of pancreatic juice is controlled in the gastric phase by the entry of acidic chyme into the duodenum. This stimulates the release of secretin, which causes the duct cells to release bicarbonate-rich pancreatic juice. The presence of proteins and fats in the duodenum stimulates the secretion of CCK, which then stimulates the acini to secrete enzyme-rich pancreatic juice and enhances the activity of secretin.
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