Lipids (Leaving Cert Home Economics): Flashcards
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Practise the cards
15 cards from this deck
Lipids are soluble in what?
Lipids are soluble in what?
Organic solvents (not water)
Double bonds in saturated fatty acids
Double bonds in saturated fatty acids
None
Physical state of saturated fats at room temp
Physical state of saturated fats at room temp
Solid
Double bonds in monounsaturated fatty acids
Double bonds in monounsaturated fatty acids
Exactly one
Double bonds in polyunsaturated fatty acids
Double bonds in polyunsaturated fatty acids
More than one
Why are some fatty acids called 'essential'?
Why are some fatty acids called 'essential'?
Body cannot manufacture them, must obtain from diet
Components of a triglyceride
Components of a triglyceride
Three fatty acids + one glycerol molecule
Energy value of lipids (kcal/g)
Energy value of lipids (kcal/g)
9 kcal/g
Smoke point definition
Smoke point definition
Temp when lipid produces continuous bluish smoke
What is an emulsion?
What is an emulsion?
Mixture of two normally immiscible liquids
How emulsifiers work
How emulsifiers work
Stabilise emulsions by reducing surface tension
Cause of hydrolytic rancidity
Cause of hydrolytic rancidity
Water causes breakdown of triglycerides
Cause of oxidative rancidity
Cause of oxidative rancidity
Reaction of fats with oxygen in air
What hydrogenation does
What hydrogenation does
Converts unsaturated fats into saturated fats
Fat-soluble vitamins
Fat-soluble vitamins
A, D, E, K