Digestion and absorption of lipids

Question 1

Where is lipase produced

Answer 1

Pancrease

Question 2

Where is lipase secreted into

Answer 2

Duodenum and ileum

Question 3

Bile is produced i

Answer 3

Liver and stored in the gall bladder

Question 4

Lipase

Answer 4

Produced in pancreas
Hydrolyses ester bonds in triglycerides forming monoglycerides and fatty acids

Question 5

Bile salts

Answer 5

Occurs before lipase action
Produced : Liver
Stored : Gall bladder
Transported : By bile duct into duodenum
Role: emulsifies lipid to form any tiny droplets called micelle
Increases SA for lipase activity
EMULSIFICATION

Question 6

Micelles

Answer 6

Water soluble vesicles
Formed by : fatty acids, glycerol, monoglycerides and bile salts
Deliver the fatty acid, glycerol and monoglycerides into epithelial cell within ileum
Release fatty acid and glycerol into epithelium for absorption

Question 7

Absorption

Answer 7

After monoglycerides, fatty acid and glycerol are released at the epithelial cell they are transport to Endoplasmic Reticulum to form triglycerides again. Triglycerides binds with cholesterol and proteins and packaged to form chylomicrons again in Golgi body

Question 8

Chylomicrons

Answer 8

Travel in vesicle to the cell membrane and are exocytosed from epithelial cell to capillaries ( Requires ATP)

Question 9

Transport of chylomicrons

Answer 9

In the capillaries, chylomicrons enter pymphatic capillaries called lacresis. They travel away from illeum to tissues like the adipose, cardiac and skeletal muscle tissue. Once they arrive the triglycerides will be hydrolyses and form fatty acids used by tissue