Digestion and absorption of lipids
No description yet. This curated deck is ready for daily study.
Card preview (10)
Where is lipase produced
Pancrease
Where is lipase secreted into
Duodenum and ileum
Bile is produced in
Liver and stored in the gall bladder
Lipase
Produced in pancreas Hydrolyses ester bonds in triglycerides forming monoglycerides and fatty acids
Bile salts
Occurs before lipase action Produced : Liver Stored : Gall bladder Transported : By bile duct into duodenum Role: emulsifies lipid to form many tiny droplets called micelle Increases SA for lipase activity EMULSIFICATION
Micelles
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
Absorption
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 is modified and packaged to form chylomicrons again in Golgi body
Chylomicrons
Travel in golgi vesicle to the cell membrane and are exocytosed from epithelial cell to capillaries ( Requires ATP)
Transport of chylomicrons
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
Emulsifaction of lipids
The breaking down of fat droplets into smaller fat droplets to increase surface area