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Section A

Water
Composed of the elements: hydrogen and oxygen, in the ratio 2:1, HO

Sources Functions Properties
Taps, wells, bottled water Transports nutrients, oxygen, Colourless, odourless and
Fruit and vegetables hormones and enzymes around tasteless liquid
Drinks, e.g. tea and coffee the body Boils at 100°C and freezes at…

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Fat
Is a macro nutrient
Eaten in large amounts and must be broken down by the body during digestion
Composed of the elements: carbon, hydrogen and oxygen in no fixed ratio
In an E ­ shaped structure
Amount of energy derived from 1g of fat is 9 kilocalories

Essential fatty…

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Include lots of fruit and vegetables in your diet
Use fat- free or low-fat dairy products
When eating out try to eat less fried foods and avoid biscuits, cakes and pastries
Use vegetable oil for frying

Effects of deficiency of fats Effects of excess of fats
Drowsiness, tired and slow…

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Protein
Is a macro nutrient
Eaten in large amounts and must be broken down by the body during digestion
Composed of the elements: carbon, hydrogen, oxygen and nitrogen
Made up of chains of amino acids
Amount of energy derived from 1g of protein is 4 kilocalories

Of the 20 amino…

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Kwashiorkor A diet with more than 30% of your calorie intake
Common in areas of famine, limited food supply and being protein, causes a build up of toxic ketones
low levels of education (people don't understand This causes kidneys to go into overdrive to try and
how to eat a…

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Granules of starch on plant cells such as potatoes, root vegetables and cereals make up the reserve
energy store of the plant
Cellulose and pectin
Cellulose (dietary fibre) is mainly found in the outer cell walls of cereals, vegetables and fruit
Pectin is the setting agent for jams ­ why…

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