Source of energy, make cell membranes and insulate bodies
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Proteins
Growth, repair and build new cells
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Mineral ions and Vitamins
Small amounts for healthy functioning body
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Imbalanced diet
Malnourished
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Exercise
Food with lower energy content than the amount of energy their body uses, the person will lose body mass
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Metabolic rate
Speed chemical reactions take place in the body, varies because of several factors, including age, gender and inherited factors. Increases as we exercise
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Mutation
Changing of structure of a gene resulting in variant form
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Antibiotics
Kill bacteria or their growth, live and reproduce inside cells
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Painkillers
Block nerve impulses
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Medicines
Some relieve symptons, others kill pathogens
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Antibodies
Protein that can neutralize pathogens
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Immunitity
Pathogens contain foreign chemicals called antigens. Lymphocytes (type of white blood cell) produce antibodies to kill a particular pathogen
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White blood cells
Ingest and destroy pathogens, produce antibodies and antitoxins that counteract pathogen toxins
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Virus
Only reproduce inside host cell, create hundreds of copies, fill host cell and burst it open, passed throughout the body
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Bacteria
Microscopic organism, living cell, rapidly multiply, release poisons or toxins that make us feel ill
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Vaccination
Injecting dead or inactivated pathogen into body to create antibodies
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