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Yr 11 HE > Fat > Flashcards

Fat Flashcards

1
Q

What is fat?

A

A concentrated source of energy

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2
Q

Approximately how much energy does it provide?

A

Approx. Twice as much as the same amount of protein or carbohydrate

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3
Q

How much energy does 1g of pure fat provide?

A

9kcal / 38kj

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4
Q

Where is excess fat stored in the body?

A

Adipose tissue

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5
Q

What does it provide when energy intake is restricted?

A

Energy reserve

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6
Q

What does adipose tissue do?

A

Surrounds and protects vital organs eg. Heart and kidneys

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7
Q

What does adipose tissue provide?

A

An insulating layer under the skin to preserve body heat and protect the skeleton

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8
Q

Fat helps the body to…

A

Absorb and use the fat soluble vitamins A,D,E and K

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9
Q

Some fat are a source of what?

A

Essential fatty acids omega 3 and omega 6

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10
Q

What important role does omega 3 and 6 play in the body?

A

Reducing CHD risk

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11
Q

What does an intake of total fat lead to?

A

Obesity

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12
Q

What are the 2 main types of fat?

A

Saturated and unsaturated

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13
Q

What does excess intake of saturated fat lead to?

A

CHD

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14
Q

What are the sources of saturated fat?

A

Animal sources:

  • beef - dairy products
  • pork - red meat
  • egg - processed meats
  • cheese
  • minced steak
  • coconut
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15
Q

What are the two types of unsaturated fat?

A

Polyunsaturated and monounsaturated

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16
Q

What are the sources of polyunsaturated fat?

A

Plant sources:

  • seeds
  • seeds
  • chick peas
  • sunflower oils and spreads
  • oily fish
17
Q

What are the sources of monounsaturated fat?

A

Plant sources:

  • olive oil, olives and olive oil products
  • avocado
18
Q

Why are omega 3 and omega 6 called essential fatty acids?

A

Because they can’t be made in the body and therefore it’s essential we include them in our diet

19
Q

Omega 3 and 6 help reduce the risk of..

A

CHD and stroke

20
Q

Where are omega 3 fatty acids found?

A

In oily fish therefore important to include 1 portion of fish a week

21
Q

Name sources of oily fish

A 
Mackerel 
Salmon 
Tuna 
Sardines 
Tinned fish
22
Q

What type of fats do some food products contain?

A

Trams fats

23
Q

How are trans fats formed?

A

When oils are hydrogenated (have hydrogen added to them)

24
Q

Why are products hydrogenated?

A

To make a more solid and versatile product

25
Q

Where are these hydrogenated oils found?

A

Readymade buns, cakes and biscuits

26
Q

What are the effects of a deficiency of fat in the diet?

A
  • Hair growth on the body to compensate for lack of insulation under the skin
  • Difficulty in absorbing and using the fat soluble vitamins
  • Weight loss, which if extreme, can impact on various body systems
27
Q

What do some theories suggest about trans fats?

A

They can contribute to CHD

Yr 11 HE (10 decks)

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