why we need food? 1) heat and energy 2) growth and repair 3) helps fight disease
factors that affect our food choice 1) cost- some foods are too expensive to buy regularly eg. steak 2) foods that are readily available 3) foods in season 4) lifestyle 5) culture and tradition 6)religious rules 7) nutritional value 8) personal like
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nutrients 1. protein 2. fat 3. carbohydrate 4. minerals 5. vitamins 6. water
protein is made up of chains of amino acids. each amino acid is made up of he elements carbon, hydrogen, oxygen and nitrogen.
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classification of protein. First class protein(usually from animals) sources: meat fish eggs etc
Second class protein, (usually from plants) sources: peas, beans lentils etc
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Functions of protein, Growth of body, repairs worn out and damaged cells
comp of fats. Saturated fats( usually called animal fats)sources: rashers
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unsaturated fats(usually called vegetable fats) sources: beans, peas, lentils etc
functions of fat in the body, gives us heat and energy, a layer of adipose tissue underneth the skin insulates the body
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how to cut down on fat: grill,bake or microwave instead of frying. cut visible fats off meat. use low fat foods
comp of carbohydrates. carbs are made up of the elements carbon, hydrogen and oxygen. fats produce more energy, they are made up of chains of simple sugars
functions/deficiency symptoms, there is a substance called haemoglobin in our blood, it carries oxygen to all the cells in the bod that need it , if we do not have enough haemoglobin our blood we risk anaemia.
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vitamin c, needed to absorb iron
vitamin d, needed to absorb calcium
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functions, why is water needed in the body? body fluids are mainly water. water is a source of calcium. water removes waste from the body. it helps keep the body at the right temperature.
dehydration occurs when our body looses more than 2% of its natural volume of water or after a long period of vomiting or diarrhoea
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Other cards in this set
Card 2
Front
protein is made up of chains of amino acids. each amino acid is made up of he elements carbon, hydrogen, oxygen and nitrogen.
Back
nutrients 1. protein 2. fat 3. carbohydrate 4. minerals 5. vitamins 6. water
Card 3
Front
Second class protein, (usually from plants) sources: peas, beans lentils etc
Back
Card 4
Front
comp of fats. Saturated fats( usually called animal fats)sources: rashers
Back
Card 5
Front
functions of fat in the body, gives us heat and energy, a layer of adipose tissue underneth the skin insulates the body
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