Topic 5 Digestive System: Liver

Question 1

• Produces bile, which contains no enzymes but emulsifies fats and contains sodium bicarbonate that helps neutralize stomach acid

Answer 1

Liver

Question 2

• Stored in gall bladder
• Will flow out via the cystic duct (which merges with the hepatic duct of the liver) into the common bile duct, which then merges with pancreatic duct that secretes into duodenum (biliary flow)
• Not all bile is stored in gall bladder, some flows directly out the duodenum

Answer 2

Bile

Question 3

• Aqueous, causes fat to clump up. Emulsification (due to bile) breaks up the fat into small particles (without chemically modifying it) which exposes a greater surface area for lipase to work on

Answer 3

1. Intestinal Fluid

Question 4

• About 6m
• Absorbs breakdown products (villi and microvilli)
  a. Amino acids and sugars -> capillaries
  b. Fatty acids and glycerol -> lymphatic system -> bloodstream

Answer 4

2. Remainder of small intestine

Question 5

• Moves through intestines via peristalsis- segmentation of the small intestine mixes chyme with digestive juices

Answer 5

3. Chyme