Summary; section 5.3

Summary:

• oil is water avoiding or hydrophobic or "water fearing"
• water avoiding compounds are called lipids
• lipids contain the water/aqueous solution in cells
• some others, circulate in the body as signals
• fats are lipids that have a glycerol that is attached to three fatty acids, all the fatty acids are connected to long hydrocarbon chains.
• some fats are liquid/some are solid
• fat cushions organs
• body insulation
• saturated fats/unsaturated fats
• saturated = all single bonds, maximum hydrogens
• unsaturated = a double bond somewhere in between
• saturated - solid, unhealthy
• unsaturated - liquids, healthier
• lipid buildup, reduce blood flow, heart disease
• carbon skeleton w/ 4 fused rings = steroid
• core set = 4 rings, differ in locations + functional group
• hydrophobic so it's a lipid
• signals - estrogen, testosterone
• Cholestrol molecule in membranes of cell
• high levels = bad for body
• increase - cardiovascular disease

Concept Check:
1. All lipids are hydrophobic or "water fearing".
2. There is the glycerol backbone, and these backbones are connected to 3 fatty acids.
3. steroids are four carbon skeletons that are fused together in a ring. Also, the signals that these steroids send, are different from the fats.
4. If a food has the label "unsaturated", it means that it is probably plant oil, and that it has a double bond somewhere in the 3 fatty acids.