GI Tract Flashcards
What secretes gastrin?
G cells of the stomach & duodenum
What do gastrins do?
Stimulate HCl from parietal gland
Where are chief cells producd?
Stomach
Where is pepsinogen secreted from?
Stomach
What doesn’t secrete bicarbonates?
Chief cells of the stomach
Where is intrinsic factor secreted from?
Fundic portion of stomach (by parietal cells for Vit B12)
Stimulated Histamine H2 receptors make?
Parietal cells (Release HCl in the stomach)
Where is secretin made?
S cells of the duodenum
Where is lactase made?
Brush border membrane
How is lactose made?
Glucose + galatose
How is sucrose made?
Glucose + fructose
How is maltose made?
Glucose + glucose
Which sugar is not absorbed in small intestines?
Malatose
What is the main movement in the small intestine?
Segmentation
What is NOT absorved in the jejunum?
Absorbed: iron, Na,Cl, K
What is a tissue that attaches the popsterior walll of peritoneal cavity to the jejunum?
Mesentery
What’s the difference between colon and all other parts of the digestive system?
Colon doesn’t have villi
Transverse colon and lungs are innervated by?
Vagus nerve –> motor parasympathetic fibers
What cells secrete bicarbonate?
Epithelial cells lining the pancreas
Centroacinar cells are found in what organ?
Pancreas
How does trypsinogen becomse trypsin?
Altering N terminal peptide
What acts adjuntivitely with lipase?
Bile
