The Five Nutritions
- Created by: alice0987
- Created on: 01-12-17 23:03
The Five Nutritions
Fat- Needed in small amounts to keep us warm, protect our vital organs and our skeletal system. Acts as an energy reserve.
Protien- Needed for growth and repair of body, tissue and to maintain and build cells.
Carbohydrate- It provides the body with instant and slow releases of energy. Also helps the digestive system.
Vitamins- Needed to stay healthy. They help to heal wounds, keep skin healthy and for growth in children.
Minerals- Many different needs in the body. Includes formation of bones and teeth, helps the nervous system and the forming of red blood cells.
Macro nutrients and Micro nutrients
Macro nutrients:-
Are needed in fairly large amounts:- -protein - fats - Carbohdrates
Micro nutrients:-
Are needed in smaller amounts:- - Vitamins - Minerals
Protein
- To make the body grow from a baby into an adult and when it has stopped growing, certain parts of the body continue to grow e.g. hair and nails.
- Repair the body when it is injured or recoving from an operation or illness and reguularly replace e.g. Skin cells and red blood cells.
- To give the body energy, although the body prefers to get most of its energy from foods containing carbohhydrates and fat rather than protein.
- Babies, children an dpregnent woman need more protein.
- There are approxinately 20 known amino acids of which are essential for growth and repair in children and 8 are essential for adults.
- High biological value (HBV) has all the amio acids e.g. meat, milk, cheese and some beans.
- Low biological value (LBV) has a few amino acids e.g. veg.
Novel Proteins
- Novel Proteins ar growth from micro-organisms which produce mycoprotein, know as quorn. It is amnufactured into chunks and mince so can be used in pies, sausages, burgers and ready ade meals.
- Quorn is low in fat, has no cholesterol and is a good source of protein for vegetarians.
Carbohydrates
Two main functions:-
- To give the body energy - our main source
- To help the body to get rid of waste products
Can be spilt up into 3 things:-
- Sugar e.g. cake, fizzy drinks, sweets
- Starch e.g. potatoes, pasta, rice
- Dietary fibre or Starch polysaccharide (NSP) e.g. brown bread, potato and fruit, veg skin
What happens when we eat carbohydrates:-
- when are eaten, they are broken down into glucose during the digestion and absorbed into the blood steam to be used for energy.
Carbohydrates
- Excess glucose is stored in the liver as glycogen and can be used when extra energy is needed.
- Eaten with protein allow the proteins to be used for growth and repair rather than energy
- Carbohydrates provide 50% of the total energy intake, with no more than 5% from sugars
- Too much Carbohydrates eaten and is not used up, you will get fat.
Stucture of carbohydrates
- All types of carbohydrates are componds of carbon, hydrogen and oxygen.
- They can be classified in many differnt ways. One common way is according to their structure.
- They can be divided into three main groups accordig to the size of the molecue.
Simple sugars/carbohydrates Monosaccharides
e.g. glucose, fructose, galactose
Disacharides These sugars are formed when two monosaccharide molecules join together with the removal of one molecule of water.
Examples of disaccharides are:
- Sucrose (glucose + fructose)
- Lactose (glucose + galactose)
- Maltose (glucose + glucose)
Complex carbohydrates are called Polysacharides These are made up of many monosaccharide molecule (usually glucose), joined together.
Examples of polysaccharides are: Starch glycogen (the form in which glucose is stored in the body) Compon
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