Lab 3.3 Flashcards
Decrease in pH seems to affect digestion more than decrease in ____________
temperature
Breakdown of food into smaller pieces (Ex. Mastication, churning, emulsification, segmentation)
Mechanical Digestion
Enzymatic and acidic breakdown of chemical bonds in mouth, stomach, small intestine
Chemical digestion
Breakdown of large molecules
Catabolize
Proteins that are responsible for regulating the rate of a chemical reaction
- lowers the activation energy
- works in specific temperature and pH range
- specific binding site for substrate
Enzymes
Glucose, fructose, ribose
Monosaccharides
Sucrose, maltose, lactose
Disaccharides
Starch, cellulose, glycogen
Polysaccharides
Glucose + fructose
Sucrose
Glucose + Galactose
Lactose
2 Glucose
Maltose
____________ are sugar molecules that are small enough to be absorbed in the GI tract
Monosaccharides
Carbohydrate Digestion
Source: Salivary Glands
Substrate: Polysaccharides
Product: Smaller polysaccharides
Location of Reaction: Mouth
Salivary amylase
Carbohydrate Digestion
Source: Pancreas
Substrate: Smaller Polysaccharides
Product: Di/Monosaccharides
Location of Reaction: Small Intestine
Pancreatic amylase
Carbohydrate Digestion
Source: Brush Border
Substrate: Alpha dextritis
Product: Monosaccharides
Location of Reaction: Small intestine
Alpha-Dextrinase
Carbohydrate Digestion
Source: Brush border
Substrate: Sucrose
Product: Glucose + Fructose
Location of Reaction: Small Intestine
Sucrase
Carbohydrate Digestion
Source: Brush Border
Substrate: Lactose
Product: Glucose + Galactose
Location of Reaction: Small Intestine
Lactase
Carbohydrate Digestion
Source: Brush border
Substrate: Maltose
Product: 2 Glucose
Location of Reaction: Small Intestine
Maltase
Protein Digestion
Source: Chief Cells
Substrate: Polypeptides
Product: Smaller Polypeptides
Location of Reaction: Stomach
Pepsin
Protein Digestion
Source: Pancreas
Substrate: Smaller Polypeptides
Product: Dipeptides, Amino Acids
Location of Reaction: Small Intestine
Trypsin/Chymotrypsin
Protein Digestion
Source: Brush Border
Substrate: Small Polypeptides
Product: Amino Acids
Location of Reaction: Small Intestine
Aminopeptidase
Protein Digestion
Source: Brush Border
Substrate: Dipeptides
Product: Amino Acids
Location of Reaction: Small Intestine
Dipeptidase
Lipid Digestion
Source: Salivary Glands
Substrate: Lipids
Product: Glycerol + Fatty Acids
Location of Reaction: Stomach
Lingual Lipase
Lipid Digestion
Source: Chief Cells
Substrate: Lipids
Product: Glycerol + Fatty Acids
Location of Reaction: Stomach
Gastric Lipase
