Gi Digestion -hydrolysis Mouth Amylase Salivary C A Amylase
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GI Digestion -Hydrolysis
Amylase Salivary C a Amylase r Pancreatic b s Lactase, Sucrase Maltase, α-dextrinase Pepsin P r o t e i n s
Trypsin, Chymotrypsin, carboxypeptidases, Proelastase Peptidases Lipase
F Bile a t s Cholesterol ester hydrolase Phospholipase
Mouth
Stomach
Hydrolyzes starch to disaccharides and small polymers ~ 5%
Inactivated by acid – stays protected in bolus - ~30% by time fully inactivated
Small Intestine
Like salivary, but stronger – w/in ~20 min all degraded to small polysaccharides On enterocytes brush borderdegrade to monosaccharides
Req’s acid – digests collagen – initiates digestion to proteoses, peptones, polypeptides Pancreatic ez’s – to small polypeptides Cleaves off ends to produce AA Digest elastin from meat On enterocytes brush border – split into small polypeptides (23aa) and single AA v. powerful – split TG into FFA and 2-MG Bile salts form micelles (emulsify) to ↑ transport and surface area for lipase Hydrolyze choleterol esters Hydrolyze phospholipids
Amylase Salivary C a Amylase r Pancreatic b s Lactase, Sucrase Maltase, α-dextrinase Pepsin P r o t e i n s
Trypsin, Chymotrypsin, carboxypeptidases, Proelastase Peptidases Lipase
F Bile a t s Cholesterol ester hydrolase Phospholipase
Mouth
Stomach
Hydrolyzes starch to disaccharides and small polymers ~ 5%
Inactivated by acid – stays protected in bolus - ~30% by time fully inactivated
Small Intestine
Like salivary, but stronger – w/in ~20 min all degraded to small polysaccharides On enterocytes brush borderdegrade to monosaccharides
Req’s acid – digests collagen – initiates digestion to proteoses, peptones, polypeptides Pancreatic ez’s – to small polypeptides Cleaves off ends to produce AA Digest elastin from meat On enterocytes brush border – split into small polypeptides (23aa) and single AA v. powerful – split TG into FFA and 2-MG Bile salts form micelles (emulsify) to ↑ transport and surface area for lipase Hydrolyze choleterol esters Hydrolyze phospholipids
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