JACKIE MALDONADO

Lipids

Lipids

Also called triglyceridesContain oxygen, hydrogen and carbon.Made of three fatty acids and one glycerol by

condensation reactionHydrophobic due to the long neutral

hydrocarbon chainTwo types of lipids: fats and oils

Fats contain saturated fatty acids, solid at room temp. ex.butter and animal fat. Unsaturated fats present in plants, olive oil, sunflower oil

Saturated fatty acid-no double bonds

Saturated(nodoublebond) and Unsaturated

Ester bonds forms between glycerol and fatty acids

Phospholipids

Made of one glycerol 2fatty acids and a phosphate group.

The fatty acid tails can be saturated of unsaturated

Major constituent of cell membrane

Phosphate head negatively charged, tails neutral

Partly hydrophobic and partly hydrophilic

Functions of lipids

Energy production- twice the energy of content of carbs and pro.

Heat insulation-layer of fat insulate the body against temperature changes.

Storage molecule (fat)-stored without water not adding much body weight. Useful for migration of birds

Shock absorbent-protects organs in the body.Some derivatives acts as hormones (testosterone,

oestrogen) and component of cell membraneProvide buoyancy- aquatic animals floating.Electric insulator in nerve cell (myelin sheet)