Energy storage structure and metabolism What is a Fat or a lipid? Energy storage structure and metabolism

What is a fat? Fat contains 3 elements Carbon Hydrogen and Oxygen It does not dissolve in water

The macro molecule The macromolecule of fat is called a triglyceride

What are the building blocks The triglyceride has two parts A back bone called glycerol Three arms called fatty acids

What are fatty acids? Fatty acids can come from Animals Eg. Bacon, butter, egg yolk, chicken skin These are called Saturated fats They are solid at room temp They have no double bonds

What are fatty acids? Some fatty acids come from plants Eg. Corn oil, safflower oil, peanut oil They are polyunsaturated They are liquid at room temp They have lots of double bonds

What are fatty acids? Some fatty acids come from fish or plants Eg. Olive oil, cod liver oil, salmon fat These are called monounsaturated fats. They only have 1 double bond

Omega 3 If the double bond is on the 3rd carbon from the end it’s an omega 3 fatty acid. They are really good for your brain and myelin sheath. Eat fish before a math exam. It makes you smart!!!!!!

Trans fats These are found in junk food and taste good but are bad for your health. The hydrogens are on opposite sides of the double bonds

What does our body use fat for? Stores energy for emergencies Builds the myelin sheath of your nerves. Builds your blood vessels Dissolves vitamins A, D, E, K Insulates our body from cold Protects our organs from shock Gives us shape Makes membranes surrounding every cell in your body.

Enzymes that break fats down The enzymes that break fat down are called lipases Lip = lipid or fat Ase = enzyme

Id of fat in Lab It’s called the grease spot test. Just like french fries in a paper bag. The paper bag becomes translucent ( the light can shine through it) Yet it remains strong. It doesn’t dry. Pioneers used to use oiled paper for windows.