Lipids & Cholesterol Flashcards
1
Q
Why do fats yield more energy than carbohydrates?
A
Exist more reduced form than carbs therefore yield more energy when oxidised
2
Q
What are the uses of lipids?
A
Energy storage, thermal and electrical insulation, transport (lipid soluble vitamins), hormones
3
Q
What forces are lipids held together by
A
Vander Walls forces
4
Q
Diff. between saturated and unsaturated fats
A
Sat=single bonds Unsat.=presence of double bond
5
Q
Function of LDL
A
Increase uptake of cholesterol into cell lining which increases pressure within blood vessels
6
Q
Function of HDL
A
Carry cholesterol back to the liver where some is secreted as bile; reduce uptake
7
Q
Why unsat. fats have lower MP than sat. fats?
A
Due to presence of db’s chains can’t pack as tightly therefore I.M. forces are weaker and a lower MP
