Lernkarten
Functions of trilgycerides (5)
Blubber for bouyancy (fat weighs les than muscle)
Insulation
Protector of organs & shock absorber
Energy source
Water source
Why does body store triglycerides rather than carbohydrates (glucose)? (2 reasons)
Triglyceride metabolism yields (wins) more ATP than glucose
Adipose tissue (lipid sotrage) can expand exponentially whereas carbohydrate storage (liver) has finite size
Differences and similarities of diglycerides and phospolipids (number of fatty acid chains, hydrophilic region, hydrophobic region)
Diglycerides: two fatty acid chains, no hydrophilic region, hydrophilic region
Phospholipids: two fatty acid chains, hydrophilic and hydrophobic regions
Phospholipids (twi things that make them useful)
Unsaturated fatty acid chain (kink) makes hydrophobic region flexible
Hydrophilic head keeps the membrane together and protects them from bigger and hydrophobic molecules
Sterols (structure 1, properties 3)
Tetra-ring structure
Grouped in lipids (same properties)
Non soluble in polar solvents (water)
Soluble in non polar (organic) solvents (ether)
Cholesterol (function (3), properties (2) -> (1))
Hormone synthesis, vitamin d synthesis, structural support in membranes
Extremely hydrophobic and insoluble in polar solvents
Packed into apolipoprotein (lipid,cholesterol,protein bundle)
What happens if you have too much cholesterol? (3)
Heart disease
Atherosclerosis
Inflexible membranes
HDL (definition, function (2), how much cholesterol do they contain?)
Apolipoprotein (lipids,cholesterol,protein) -> High density of cholesterol
Transportation of fat (cholesterol, phospholipids, triglycerides) & cholesterol from cells to liver for excretion or reuse
