5.8- Alternative Sources of Energy Source (LIPIDS)

In lipolysis, triglycerides are broken down into…

glycerol + 3 fatty acid chains.

What happens in lipolysis

• Lipase splits glycerol and the fatty acids apart.

• Glycerol is phosphorylated into G3P (a glycolysis intermediate).

• Fatty acid chains are broken down via beta- oxidation to produce a lot of ATP.

In beta oxidation, carbons are…

cut away from the fatty acid chain to produce acetyl CoA, NADH, and FADH2

Fats provide more…

ATP per gram than carbohydrates, but carbohydrates are the preferred cellular energy source since they can be catabolized quicker.

Beta oxidation occurs in the…

mitochondrial matrix

The brain prefers to use….

glucose for energy but when glucose is low, the brain uses ketones (produced from

fatty acids).