Triglycerides

Triglycerides  fats and oils made up of these. These cannot cross cell membranes, but when we break off one of the fatty acids we get a di, then monoglycerides. Glycerol can cross a cell membrane.

• they are very energy dense too. They can store more energy than protein.

• Also the thin layer underneath your skin there is fat

• In females if there is no fat then the reproductive system shuts down and those people do not ovulate.

• Adipose  triglycerides are stored here. Each cell can get 50 X larger. Plus you can create more fat cells.

• Anorexia Nervosa  loose the fat. Subcutaneous fat is gone. The subcutaneous fat is about 20-25% of your body weight.

Fat soluble vitamins  A,D,E, and K

Phospholipids  involved in the formation of cell membranes and function as emulsifyiers (decreases surface area through mechanical process, allows fat to mix with water) Bile acids are the main emulsifiers

Bile Acids  composed of cholesterol, bilirubin (waste product of red cell degradation)

Sterols  steroids – there is no glycerol or fatty acid base. Do not dissolve in water either, so technically a fat

Cholesterol  acytel co-a

It is a component of many things. Testosterone, cell membranes, steroids, and many other things.

• we have the ability to make about 10% of our needed cholesterol

• Need 700 mg chol/day

• Cholesterol cannot come from plants

Category: Biochemistry Notes