Cancer

• What do the genes in the nucleus do ?

  tells cells when to divide and when to stop diving in mitosis
• How are tumours formed ?

  when changes take place in the genes and it leads to uncontrolled growth and mitosis
• What are benign tumours ?

  growth of abnormal cells which are found in one area
• Key features of benign tumours

  • within a membrane
  • does not invade other parts of the body
  • they stay in one place
• What are malignant tumours/cells ?

  the cells invade neighbouring tissues and move into the bloodstream
• Why are malignant tumours condsidered as cancer ?

  once in the bloodstream the cells spread to different parts of the body and form new tumours
• What do scientist call the new malignant tumours?

  secondary tumours
• Risk factors of cancer

  • inheriting genetics
  • lifestyle
• Examples of genetic cancer

  breast cancer ,prostate cancer and large intestine cancer
• Examples of cancer linked to lifestyle

  • smoking:lung cancer
  • UV light :skin cancer
  • Alcohol:mouth and throat cancer
• What is radon?

  a radioactive gas which increases the risk of developing lung cancer
• Why does radon increase the risk of getting cancer ?

  releases ionising radiation which damages the DNA in our cells
• What can radon cause ?

  cause our cells to undergo uncontrolled cell division