Secretin (inhibiting gastric acid secretion), Cholecystokinin (fat digestion) & Cholecystokinin

102

0

HWC

• As chyme approaches the small intestine, secretin also targets acid-producing parietal cells in the gastric mucosa. • Increased secretin inhibits gastric add secretion. • With less gastric acid produced, the chyme going into the intestine is less acidic. • The hormone CCK also regulates the intestinal phase of digestion. • If fatty chyme enters the duodenum, enteroendocrine cells of the intestinal mucosa are stimulated to produce cholecystokinin (CCK). • CCK targets pancreatic acinar cells and the biliary system. • Delivery of pancreatic lipase and bile is increased to the small intestine. • CCK promotes the digestion of fats in the chyme. Cholecystokinin (gastric emptying) • CCK also regulates gastric emptying. • Distended duodenum and fatty acids or undigested proteins in the chyme promote the secretion of CCK. • CCK triggers the closing of the pyloric sphincter, thereby inhibiting gastric emptying. • High-protein and high-fat meals stimulate the secretion of CCK and consequently take longer to digest and empty.

Share

Embed

Copy and paste this code into your website or blog.

Add To

You must login to add videos to your playlists.

Comments

0 Comments total

to post comments.

No comments have been posted for this video yet.