Biology B2 - Photosynthesis and digestion

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  • Created by: Sara
  • Created on: 08-03-13 17:41
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  • photosynthesis and digestion
    • Digestive system
      • Salivary gland
      • Liver
        • Bile duct
          • Gall bladder
      • oesophagus
      • Stomach
      • Pancreas
      • Large intestine
        • Colon and rectum
      • Appendix
      • Small intestine
        • Ileum and duodenum
    • Photosynthesis
      • As a result of photosynthesis LIGHT energy, from the sun is converted into CHEMICAL energy, in glucose.
      • Carbon dioxide + water = glucose (food) + oxygen
        • Arrow (=) is sunlight
      • photosynthesis can be investigated by testing plants for starch
      • The more light the quicker the reaction for photosynthesis will take place
      • limiting factors
        • Light
        • Carbon dioxide
        • Temperature
        • They limit the rate of photosynthesis, if they are in short supply
      • Plant method of making food
    • Plants
      • Cell wall
      • Cell membrane
      • Vacuole
      • Nucleus
      • Chloroplasts
      • Cytoplasm
    • Digestion
      • Digestion is the conversion of large, insoluble food molicules into smaller soluble molecules so they can be absorbed into the blood.
      • These molecules (food) are very large and cannot be used by the body directly because they will not dissolve. To allow the body to use them they must be broken down or DIGESTED.
      • Food groups
        • Proteins
          • For growth and repair
            • Fish, eggs and lean meat
        • Fibre
        • Carbohydrates
          • provide energy
            • Starch = potatoes, pasta, rice
        • Vitamins
        • Lipids (fats)
          • For energy store and heat insulation
            • Butter, fried foods, cakes
  • Colon and rectum
  • Digestion
    • Digestion is the conversion of large, insoluble food molicules into smaller soluble molecules so they can be absorbed into the blood.
    • These molecules (food) are very large and cannot be used by the body directly because they will not dissolve. To allow the body to use them they must be broken down or DIGESTED.
    • Food groups
      • Proteins
        • For growth and repair
          • Fish, eggs and lean meat
      • Fibre
      • Carbohydrates
        • provide energy
          • Starch = potatoes, pasta, rice
      • Vitamins
      • Lipids (fats)
        • For energy store and heat insulation
          • Butter, fried foods, cakes

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