CCEA Home Economics: Fat Revision

This document covers:

  • Obesity
  • Cholesterol
  • Coronary Heart Disease
  • Functions of Fat
  • Types of Fat (Saturated, Unsaturated, Polyunsaturated, Monounsaturated)
  • Omega 3 and Omega 6
  • Tran’s fats
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  • Created by: Stephen
  • Created on: 27-09-11 17:36
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Fat- Revision Notes
What are fats?
Fats are made up of the elements
Carbon
Hydrogen
Oxygen
Functions of fat,
Supplies us with a concentrated source of energy.
Needed for structure of all body cells.
Provides us with vitamins A and D
Body fat stored under skin provides us with insulation (helps keep us warm)
Provides us with unsaturated fat (essential fatty acids)
Fat stored around major organs prevents them from damage (protection)
Makes food taste good and gives food texture.
Types of fat
There are two main types of fatty acids. They are called Saturated and
Unsaturated fatty acids.
Saturated Fatty acids: -
All carbon atoms in the fatty acid molecules are linked by single bonds
[-[-[-[-
Saturated fats come mainly from animal sources such as meat, eggs, milk and
dairy produce e.g. cream and butter
Usually solid at room temperature
Unsaturated Fatty Acids: -
Two or more of the carbon atoms are linked by a double bond [=[-[=[-
Come mainly from plant sources such as peas, beans and lentils (pulse
vegetables) Whole cereals, nuts, cooking oil, margarine and oily fish.
Usually liquid at room temperature.
Saturated fat Unsaturated fat
Meat Peas
Eggs Beans
Milk Lentils
Dairy produce Wholegrain cereals
Cream Nuts
butter Cooking oil
Other types of Fat (Unsaturated),
Polyunsaturated
Polyunsaturated fats have more than one double bond and are mainly found in
vegetable oils.

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Monounsaturated
Monounsaturated fats have one double bond on the molecule and are found in most
animal and plant foods.
Polyunsaturates and to a lesser extent Monounsaturates have been shown to lower
blood cholesterol levels and therefore help in reducing the risk of heart
disease.
It is better to eat foods rich in Monounsaturates (olive oil and rapeseed oil) and
Polyunsaturates (sunflower oil and Soya oil) than foods rich in saturates.…read more

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The COMA report recommends that we have no more than 35% of our food energy
should come from fat in food. Saturated fatty acids should provide no more than
11% of food energy. Therefore 24% should come from unsaturated fatty acids.
Altogether 35%
Saturated 11%
Unsaturated 24% 1g of fat= 9 kcal
How to reduce fat intake.…read more

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What is a heart attack?
The heart pumps blood to every part of our body. A heart attack occurs when the
blood supply to the heart is cut off or reduced, The heart muscle dies.
Coronary heart disease.
Due to build up of cholesterol and many other factors Coronary Heart Disease
(CHD) can occur. Some of the risk factors of CHD are: -
Cigarette smoking
Raised blood cholesterol
High fat diet
High blood pressure
Lack of physical exercise
Obesity
Stress
Being male
Increased age.…read more

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Q4) List two sources:
_____________
_____________
Q5) What are unsaturated fats?
____________________________________________________________
____________________________________________________________
___________________________________________________
Q6) List two sources:
_____________
_____________
Q7) What are hydrogenated fats?
____________________________________________________________
____________________________________________________________
____________________________________________________________
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Q8) List 4 risk factors of CHD:
_____________________________
_____________________________
_____________________________
_____________________________
Q9) What are the two main conditions caused by too much fat in the diet?
_____________________________
_____________________________…read more

Comments

eager beaver to learn

thank you so much really helpful


eager beaver to learn

thank you so much really helpful


eager beaver to learn

thank you so much really helpful


eager beaver to learn

thank you so much really helpful


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