Question

1) Hormone: Gastrin from the ____stomach_____ wall > stimulates production of ______

2) Hormone: Secretin from the ___________ wall > stimulated by the presence of _____ > leads to release of __________________

How does the pancreas know what mixture of enzymes to release for digestion?

3) Hormone: Cholecystokinin sent via blood to the _____________ to signal need for release of ________, which is needed for the digestion of _______. Cholecystokinin also slows gut motility.

What if a person has had their gall bladder removed?

Answer 1

1) Gastrin is a hormone which is produced by the stomach that stimulates the release of gastric acid (HCl). It is located in the G cells in the lining of the stomach and upper small intestine.

2) Secretin helps regulate the pH of the duodenum. It is secreted from the duodenum wall and is stimulated by gastric acid. This hormone leads to the inhibition of the secretion of gastric acid from the parietal cells of the stomach and stimulates the production of bicarbonate from the ductal cells of the pancreas.

Pancreatic enzymes help in the break down food in the small intestine. When food enters the duodenum, it is acidic in nature and is neutralized by pancreatic juice, which is an alkaline secretion of the pancreas containing enzymes that aid in the digestion of proteins, carbohydrates and fats.

3) Cholecystokinin is a hormone which plays role in facilitating digestion within the small intestine. Cholecystokinin sent via blood to the the small intestine to signal need for release of digestive enzymes from the pancreas and bile from the gallbladder that aid in the digestion of proteins, carbohydrates and fats.

The function of gall bladder is to store bile. When the gallbladder is removed, bile which is made by the liver can no longer be stored between meals and the bile flows directly into the intestine whenever the liver produces bile. This bile is not concentrated and thus this affects the fat digestion.