Chapter 2.3 - lipids

what are the functions of lipids?

S - storage of energy

H - hormonal roles - steroids

I - insulation - thermal

P - protection of organs

S - structural roles - cholesterol

what are unsaturated fatty acids?

they are double bonds and are generally liquid at room temperature (plant oils)

what are saturated fatty acids?

they arent double b

what are some differences between trans and cis fats?

cis:

• H atoms same side

• double bond - kink

• natural

• good for health

trans:

• H atoms different side

• doesn’t create kink - linear chain

• processed food

• bad for health

what are some health risks?

• high levels of cholesterol = atherosclerosis = coronary heart disease

• cis fats raise HDL (decrease blood cholesterol)

• saturated fats raise levels of LDL

• trans fats raise levels of LDL while increasing blood cholesterol and lowering HDL

• fats + cholesterol cant dissolve in blood - packed with proteins:

• low density lipoproteins transport cholesterol from liver to body (bad)

• high density lipoprotein scavenges excess cholesterol and returns it to the liver (good)