Digestion - Lipid Flashcards
1
Q
Event in the oral cavity
A
No digestion happens but lingual lipase originates from glands at the back of the tongue
2
Q
Event in the stomach
A
Lingual ipase and gastric lipase digest TAGs containing short- and medium-chain fatty acids
3
Q
Events in the small intestines
A
- Emulsification thru bile salts
- Pancreatic lipase digests TAGs
- Cholesterol ester hydrolase digests choleteryl esters
4
Q
Pancreatic lipase require ___ to function
A
Colipase
5
Q
How are lipid molecules absorbed in the intestines?
A
- Require mixed micelle formation
- Free fatty acids
- Cholesterol
- 2-monoacyglycerols
- ADEK
- No need for micelle
- Short- and medium-chain fatty acids
6
Q
Why is micelle formation necessary?
A
Dietary lipids are hydrophobic
7
Q
T/F. The micelle is taken up by enterocyte absorption
A
False
8
Q
Fate of bile salts
A
Reabsorbed in the terminal ileum
9
Q
Fate of the absorbed dietary lipids
A
In the ER, they are converted back to TAGs and cholesteryl esters and are packaged as chylomicrons and released into the lymphatic circulation (lacteals)
