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Johnson, T Phys2
Digestive System
| Question | Answer |
|---|---|
| Functions of cholecystokinin (CCK) | 1. Stimulates pancreas to release enzymes. 2. opposes gastrin. 3.stimulates gallbladder contraction |
| What is sodium cotransport? | Glucose is transported out of the GI lumen along with sodium b/c it is too large to diffuse through the membrane. A sodium gradient must be maintained. |
| Where are nutrients from the blood first transported? | To the liver through the hepatic portal vein. |
| What is a chylomicron? | A micelle that allows lipids to be transported from the epithelium into the lymph. |
| What does amylase do? | Digests polysaccharides into disaccharides |
| What is bile? | Created by the liver and stored in the gallbladder, bile contains salts that emulsify lipids to allow for absorption. Also contains bicarb. |
| What does gastrin do? | Stimulates the secretion of gastric juice containing pepsin and HCl. |
| What does pancreatic juice contain? | Bicarb to neutralize acid, amylase, lipases, nucleases and proteases. |
| What are chief cells? | AKA zymogenic cells. These are gastric glands that secrete enzymes especially the precursor to pepsin. |
| What is a parietal cell? | A gastric gland that secretes HCl. |