Phys: GI Flashcards Preview

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Flashcards in Phys: GI Deck (12)
1

mouth fxn, enzymes/cells/notes?

starch digestion
salivary amylase
parotid, submandibular, sublingual glands

2

esophagus fxn, enzymes/cells/notes?

transport
none
many mucus cells

3

stomach fxn, enzymes/cells/notes?

protein digestion initiated
chief cells- pepsinogen
G cells- gastrin
Parietal cells- HCL; IF
rugae increases surface area

4

Doudenum fxn, enzymes/cells/notes?

10-12 inches
fat digestion& starch digestion
pancreatic lipase & amylase
Brunners cells- secrete alkaline mucus
sphincter of oddi: CCK; bicarbonate
transit through SI 2-4 hours

5

Jejunum fxn, enzymes/cells/notes?

6-10 feet
peptide, disaccharide digestion & absorption
carboxy-peptidase from pancreas, most food digestion is done here.
major resorption of water

6

Ileum fxn, enzymes/cells/notes?

10-15 feet
reabsorption of bile; B12
peyers patches; lymphoid tissue

7

Small intestine fxn, enzymes/cells/notes?

carb, protein, lipid digestion
crypts of lieberkuhn's enzymes, brush border, plicae circulares, goblet, paneth & argentaflin cells
Enzymes: carboxypeptidase, aminopeptidase, dipeptidase, peptidase, dextrinase, glucoamylase, maltase

8

gall bladder fxn, enzymes/cells/notes?

store & conc bile
cystic duct joins with common hepatic duct from liver to form common bile duct, empties into duodenum.
CCK causes bile from GB> duodenum- also inhibits gastric emptying

9

Pancreas fxn, enzymes/cells/notes?

digestive enzymes & produces the hormones insulin, glucagon
pancreatic lipase, amylase, trypsin, chymotrypsin
secretin releases bicarbonate juic
CCK releases enzyme rich juice

10

Colon fxn, enzymes/cells/notes?

water reabsorption & electrolytes
paneth cells (kill bacteria)
bacteria in colon, taenia coli (muscle)
transmit through LI 3-4 days

11

rectum fxn, enzymes/cells/notes?

storage for elimination
no taenia coli
columns of magagni allow for expansion
cancer- recto-sigmoid area

12

Liver fxn, enzymes/cells/notes?

4 lobes
produces/stores/filters
makes bile
kupffer cells
hepatocytic cells-detoxifies, processes fats & AA, vit. storage, makes blood proteins
Urea cycle