Biology revision

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    • diet and metabolic rate
      • balanced diet
        • contains
          • Carbohydrate
          • fats
          • proteins
          • vitamins
          • Minerals
      • unbalanced diet
        • become malnourished
          • to fat/ too thin
          • suffer from deficiency diseases
      • metabolic rate
        • rate at which
          • chemical reactions
            • take place in the body
    • diet and cholesterol
      • high level of cholesterol
        • increases risk
          • developing plaques in artery walls
      • fats
        • unsaturated
          • lower blood cholesterol levels
        • saturated
          • raises blood cholesterol levels
    • Pathogens and infections
      • disease
        • micro-organisms
          • cause disease
            • called pathogens
        • bacteria
          • reproduce rapidly
            • inside the body
          • produce toxins
            • make us ill
        • viruses
          • reproduces
            • inside body cell
          • destroys cells
      • epidemic
        • widespread
      • pandemic
        • national and international
    • drugs against disease
      • antibiotics
        • kill bacteria inside your body
          • without killing your own cells
        • do not always work
          • bacteria can become resistant
            • natural selection
      • vaccination
        • small amount
          • dead/inactive viruses
            • injected into body
    • growing bacteria
      • culture
        • should be kept lower than 25 degrees
      • sterile technique
        • stop contamination

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