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Food Digestion So what happens to that Quarter Pounder with Cheese, Large Fries and Chocolate Milk Shake
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Understanding Digestive Enzymes
Digestion is the breakdown and absorption of food ABSORPTION ONLY TAKES PLACE IN THE SMALL INTESTINE
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Classified by their Substrates
Protease & Peptidase Lipases Carbohydrase Break proteins into amino acids Split fat into 3 fatty acids Split carbs into smaller sugars - Glucose
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Digestion occurs at the
Oral Cavity Stomach Duodenum Jejunum Teeth Peristalsis Villi Tongue Acids Enzymes Saliva Enzymes Neutralizers
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Digestive Enzymes are produced
Salivary Glands Stomach Pancreas Small Intestine
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Teeth Mechanical Mastication End Product Ground Food Chemical None
Affects None
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Tongue Mechanical Moves food back and forth End Product Bolus Chemical
None Affects None
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Hard Palate Mechanical Helps to shape bolus End Product Round Bolus
Chemical None Affects None
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Salivary Glands Mechanical Moistens End Product Moist Bolus Chemical
Amylase Affects Polysaccharides Starches
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No Mechanical or Chemical change to Food. Pushes Food Via Peristalsis
Pharynx Mechanical End Product No Mechanical or Chemical change to Food. Pushes Food Via Peristalsis Chemical Affects
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No Mechanical or Chemical change to Food. Pushes Food Via Peristalsis
Esophagus Mechanical End Product No Mechanical or Chemical change to Food. Pushes Food Via Peristalsis Chemical Affects
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Stomach End Product Chyme Mechanical Churns via Peristalsis
Three Muscles Chemical Pepsin Gelatinase Gastric Amylase Gastric Lipase Rennin HCl Gastrin Affects Protein Breaks down Muscle Collagen Breaks down Butter Fats Milk Fats Milk Proteins Activates Enzymes/Breaksup Lg Food Stimulates more HCl Production
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Liver Mechanical None End Product Still Chyme Chemical Bile Affects
Emmulsifies Fat
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Gall Bladder Mechanical None Bile does the Breakdown End Product
Still Chyme Chemical Stores Bile CCK Affects Released with Lg Fat quantities Stimulates Gall Bladder to Void NOTE: Bile Released INTO the Duodenum!
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NOTE: Pancreatic Juices Released INTO the Duodenum!
Pancreas Mechanical None End Product Chyme Chemical Bicarbonates Trypsin Chymotrypsin Pancreatic Amylase Steapsin Insulin Secretin Affects Neutralizes Stomach Acids Proteins Polysaccharides Fats Regulates Blood Glucose Stimulates NaCO2 Production NOTE: Pancreatic Juices Released INTO the Duodenum!
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NOTE: SI Enzymes found in Jejunum!
Small Intestine Mechanical Pushes Chyme Along Peristalsis Water Absorption End Product Chyme NutrientAbsorption Chemical Pepidase Lactase Sucrase Amylase Affects Proteins Milk Fats Sugars Polysaccharides NOTE: SI Enzymes found in Jejunum!
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Large Intestine Mechanical Absorbs Water Absorbs Salts End Product
Feces Chemical Affects Bacterial Action to Break down some Cellulose Bacterial Action to regulate fluidity of Feces Water Absorption Regulation: Diarrhea vs Constipation
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Gastric Juices Production All the enzymes are produces by the Stomach
End Product Pepsin HCl Actions HCl Converts Pepsinogen into Pepsin Pepsinogen is stimulated by Gastrin Gastrin is stimulated by Smell, Sight, Taste Thinking
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Pancreatic Juices Production
All the enzymes are produces by the Pancreas Actions Secretin important to stimulate NaCO2 production to neutralize the Strong Stomach Acids Prevents burning away of Duodenum
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