Phys: GI Flashcards
mouth fxn, enzymes/cells/notes?
starch digestion
salivary amylase
parotid, submandibular, sublingual glands
esophagus fxn, enzymes/cells/notes?
transport
none
many mucus cells
stomach fxn, enzymes/cells/notes?
protein digestion initiated chief cells- pepsinogen G cells- gastrin Parietal cells- HCL; IF rugae increases surface area
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
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
Ileum fxn, enzymes/cells/notes?
10-15 feet
reabsorption of bile; B12
peyers patches; lymphoid tissue
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
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
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
Colon fxn, enzymes/cells/notes?
water reabsorption & electrolytes
paneth cells (kill bacteria)
bacteria in colon, taenia coli (muscle)
transmit through LI 3-4 days
rectum fxn, enzymes/cells/notes?
storage for elimination
no taenia coli
columns of magagni allow for expansion
cancer- recto-sigmoid area
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
