Q.State the site of production and function of Secretin, Gastrin and Cholecystokinin.

The gastro-intestinal mucosa itself contains scattered endocrine cells that coordinate digestion hormonally, distinct from the nervous coordination covered earlier in the chapter.

Step 1 (site). Gastrin, Secretin and Cholecystokinin (CCK) are all produced by these endocrine cells embedded in the gastro-intestinal mucosa.

Step 2 (Gastrin). Gastrin stimulates the gastric glands to produce gastric juice.

Step 3 (Secretin). Secretin is responsible for triggering secretion of pancreatic juice from the pancreas and bile from the liver. …

Fix the common production site first (GI mucosa), then match each named hormone to its …

• Confusing Secretin's target (pancreatic juice + bile) with Cholecystokinin's target (pancreatic enzymes + bile release from the gall bladder specifically) -- both involve bile, but by slightly different mechanisms. …