Mechanical Digestion
begins in the mouth as food is chewed
Chemical Digestion
hydrochloric acid kills microorganisms, breaks down food and converts pepsinogen to pepsin
Pepsinogen
is inactive until it is converted to pepsin which breaks down protein
Gastrin
stimulates the release of more hydrochloric acid and pepsinogen
Cholecystolkinin
secreted by duodenum and causes gallbladder to contract and release bile
Bile
emulsifies fat (breaks it apart)
Amylase
breaks down carbohydrates and starches
Lipase
breaks down small fat globules
Protease
breaks down large protein molecules
Peptidase
breaks down small protein molecules into amino acids
Lactase
breaks down sugar molecules in milk