Lipids Flashcards

1
Q

How can you tell it is a saturated fat by the structure?

A

The added glycerol

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2
Q

Do saturated fatty acids have one or two bonds?

A

one

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3
Q

true or false: Unsaturated fatty acids have single bonds

A

False: they have double bonds

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4
Q

Do polyunsaturated fatty acids have double bonds?

A

Polyunsaturated fatty acids have double bonds between all carbons

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5
Q

What does hydrogenation lead to?

A

It leads to trans-fats

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6
Q

How does hydrogenation work?

A
  1. Liquid oils converted to solid fats
  2. Heating veg oils in presence of hydrogen
  3. Double bonds in unsaturated fats become
    saturated - filled with hydrogens
  4. Trans-fat acids are produced
  5. Hydrogenated oil is harder at room temp
  6. Tub margarine is less hydrogenated and has
    fewer trans-fatty acids than brick margarine
  7. Not good for our hearts
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7
Q

Talk about saturated fats:

A

saturated fats contain no double bonds all carbons are singular bonded and all carbon atoms are holding al the hydrogen they can and usually are in animal products

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8
Q

Talk about unsaturated fats:

A

Unsaturated contains double bonds and are usually liquid at room temp and usually plant products

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9
Q

What is cholesterol?

A

Cholesterol is a waxy substance that lines our arteries and stretches them.

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10
Q

What types of cholesterol is there?

A

There is LDL which is low density lipoproteins which is bad for us and then HDL which is high density lipoproteins which is good for us.

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11
Q

How much does 1g of lipids give us in energy?

A

38kj

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12
Q

What are the functions of lipids in our bodies?

A
  • it forms a layer of fat under our skin for warmth
  • offers protection to organs
  • Keeps hair and skin healthy
  • delays hunger
  • valuable source of fat-soluble vitamins K,A,D,E
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