Describe the critical roles of lipids

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Reference no: EM133411415

Questions:

1. Describe the critical roles of lipids.

2. What are fatty acids (FA)? Describe them. Draw some.

3. What are the most common fatty acid chain lengths, and what foods supply these? Which two fats as essential and why?

4. Describe triacylglycerol (TAG). Where is it found, and why is it needed? How does it differ from triglyceride?

5. Describe cholesterol. Where is it found, and why is it needed?

6. Describe phospholipids. Where is it found, and why does the body need it?

7. Describe TAG digestion in detail. Where does it start, what is needed for it to proceed, and what are the products of digestion? Like TAG, DAG, MAG, FFA, Bile, Emulsification, Hydrophobic, Lipase, and Micelle.

8. Absorption of free FA and monoacylglycerol (MAG) into the enterocyte needs to be better understood compared to carbohydrates. What happens once inside the enterocyte?

a. Compare/contrast the fate of medium-chain FAs and long-chain FAs.
b. How is cholesterol absorbed?

9. How does dietary cholesterol intake compare with endogenous production of cholesterol? What does this mean?

10. Describe a chylomicron. Where is chylomicron synthesized, and what is its purpose?

11. Broadly describe a lipoprotein - as if talking to a 1st-year nutrition student. What is lipoprotein's defining role?

12. Now, describe the lipoprotein more specifically. What types exist, and what is their function?

13. Chylomicrons deliver dietary lipids to tissues of the body. Which tissues primarily receive lipids in a person with healthy metabolism?

14. How are FA, diacylglycerols (DAG), and MAG taken up by the body's cells (tissues)? What is the key enzyme needed for this?

16. Lipoprotein lipase (LPL) is a critical enzyme for hydrolyzing TAGs. Where is it found (list locations and sites)? What are the products of LPL?

18. FFA from TAG, DAG, MAG, or phospholipids can all provide energy via B-oxidation. Briefly draw/describe B-oxidation.

19. During b-oxidation, where do the 2-carbon Acetyl CoA products go? What are two common fates?

20. Does cholesterol supply energy to the body, like TAG and phospholipids?

Reference no: EM133411415

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