Chapter 17 Digestive System Accessory Organs Pancreas Liver Gall Bladder 17-2

Major Organs 17-3

Pancreas 17-29

Pancreatic Juice pancreatic amylase – splits glycogen into disaccharides pancreatic lipase – breaks down triglycerides trypsin, chymotrypsin, and carboxypeptidase – digest proteins nucleases – digest nucleic acids bicarbonate ions – make pancreatic juice alkaline 17-30

Regulation of Pancreatic Secretions acidic chyme stimulates release of secretin secretin stimulate release of pancreatic juice 17-31

Liver 17-32

Liver Functions produces glycogen from glucose breaks down glycogen into glucose converts noncarbohydrates to glucose oxidizes fatty acids synthesizes lipoproteins, phospholipids, and cholesterol converts carbohydrates and proteins into fats deaminates amino acids forms urea synthesizes plasma proteins converts some amino acids to other amino acids stores glycogen, vitamins A,D, B12, iron, and blood phagocytosis of worn out RBCs and foreign substances removes toxins from blood 17-35

Composition of Bile water bile salts bile pigments cholesterol emulsification of fats absorption of fatty acids, cholesterol, and fat-soluble vitamins bile pigments cholesterol electrolytes 17-36

Gallbladder 17-37

Regulation of Bile Release fatty chyme entering duodenum stimulate gallbladder to release bile 17-38