B6- preventing and treating disease

• What causes cancer


  Changes in typically tightly controlled genes in the nucleus genes that leads to uncontrolled growth and mitosis - this produces a tumor
• what are benign tumours

  Growth of abnormal cells in one area

  Usually contained in a membrane

  Do not invade other parts of the body - stay in one place
• What are malignant tumors

  Malignant cells invade neighbouring tissues and move into blood stream

  Malignant tumor cells are classed as a cancer

  Once in the bloodstream the cells spread to different parts of the body and form secondary tumours
• risk factors for developing cancer

  • genetics (breast, prostate and large intestine cancer)
  • smoking (lung)
  • ultraviolet light (skin)
  • Alcohol (mouth and throat)
• what is radon

  a radioactive gas which increases your risk of developing lung cancer

  Releases ionising radiation which damages the dna of our cells - causes cells to undergo uncontrolled mitosis
• What are communicable diseases

  Can be spread from person to person

  Spread by pathogens
• What are non-communicable disease

  Cannot be passed from person to person - coronary heart disease
• What is health

  Health is defined as the state of physical and mental well-being

  Ill health can be cased by both communicable and non-communicable diseases

  It can also be causes by poor diet, high levels of stress and other life-situations (working with harmful chemicals)
• What factors effect health

  Diet

  Stress

  Life situations - location, gender, financial, ethnicity
• What is health

  A state of physical and mental wellbeing