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26 Cards in this Set
- Front
- Back
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What are the 3 main reasons we need food? |
1: As a source of energy for cells 2: For growth and repairing of tissues 3: To fight against diseases and keep our body healthy |
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What is diet? |
It is the food that we eat |
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What are the 5 main types of food substances? |
Carbohydrates Proteins Lipids Vitamins Minerals |
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Give 2 additional essentials |
Water and fibre |
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What is a balanced diet |
A diet which provides all the nutrients at the right proportions to keep your body healthy |
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What is the percentage of carbohydrate in our body's mass? |
5% |
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What is the importance of carbohydrates? |
They are the body's main fuel for supplying cells with energy |
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How do cells release this energy? |
By oxidising glucose in the process of cell respiration |
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What is the chemical formula of glucose? |
C6H12O6 |
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What are the 3 main elements in glucose? |
Carbon, hydrogen and oxygem |
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What are the 3 main types if sugar? |
Fructose Lactose Sucrose |
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What is the importance of sucrose? |
It is the main sugar which is transported down plant stems |
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Give 2 physical properties of sugar |
They all taste sweet They are all soluble in water |
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Give one health problem resulting from the over consumption of sugar. |
Tooth decay |
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Describe the process if tooth decay |
If we don't brush our teeth, food will be left over on the surface of our teeth Bacteria will then digest the food by converting it to acid The acid will penetrate the tough enamel and several layers until it reaches the dentine In the dentine, the bacteria will form a cavity and enter it, enlarging it until I reaches the nerves of the teeth where the pain is felt |
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We get most of our carbohydrates from......... |
Starch |
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What is starch |
It is a large insoluble molecule |
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What is the speciality of starch and state one adaption which allows this to take place |
It is the main storage carbohydrate in plants....it is insoluble |
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Starch is a ............ of ............. |
Polymer, glucose |
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Give a carbohydrate similar to starch which is found in animals |
Glycogen |
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Give 2 places where it is located |
In a the liver and muscle |
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What is its function |
It acts as a store of energy |
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Gibe another polymer of glucose |
Cellulose |
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Why are humans unable to digest cellulose |
As our gut doesn't produce the enzyme needed to break the cellulose molecule down |
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Give one compound which cellulose forms |
Dietary fibres /roughage |
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What is the function of dietary fibre |
It gives the muscles of the gut something to push the food against as it is moved through the intestine avoiding constipation |
