BCH101intermediate
Arrange the steps of dietary triacylglycerol digestion and absorption in the small intestine in the correct chronological order.
Answer
Emulsification of dietary lipid droplets by bile salts, Hydrolysis of triacylglycerols by pancreatic lipase into free fatty acids and 2-monoacylglycerols, Incorporation of lipid hydrolysis products into mixed micelles, Uptake of free fatty acids and 2-monoacylglycerols across the enterocyte brush border membrane
Explanation
### The order
1. **The triacylglycerol is presented to digestive enzymes in the gut**: digestion brings dietary lipid into contact with the relevant enzymes.
2. **Digestive lipases act on the triacylglycerol**: lipases catalyze hydrolysis of ester bonds.
3. **Fatty acids and other smaller lipid products are released**: hydrolysis yields components that can be processed for absorption.
### Terms
- **Triacylglycerol**: a glycerol molecule esterified to three fatty acids.
- **Lipase**: an enzyme that hydrolyzes lipid bonds.
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