Digestion and absorption - Digestion and absorption of fats
4 important questions on Digestion and absorption - Digestion and absorption of fats
Why do lipids have to be emulsified in micelles (very small droplets) before they can be absorbed?
Because lipids are hydrophobic.
How does the enterophatic circulation goes?
1) Gall bladder stores bile
2) Bile will be released in the duodenum
3) Bile emulsifies fats in the small intestine (5% secreted in faeces)
4) Reabsorption in blood circulation
5) In the liver bile is made from cholesterol
6) Start with 1)
With what are resterified triacyglycerols packaged?
- Proteins
- Phospholipids
- Cholesterol and cholesterol esters
- Carotenes and fat-soluble citamins
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In what four compound groups can we distinguish dietry lipids?
- Triacyglycerols (triglycerides); glycerol eterfied to 3 fatty acids.
- Phospholipids; gycerol esterfied to carbon-3
- Steriods (incl. cholesterol); chemicaly completly different from triglycerides/phopholipids and no significant source of metabolic fuel
- Others; vitamin A, carotenes, Vitamin D, vitamin E and vitamin K.
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