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Cancer: Cell Division Gone Wrong

Cancer: Cell Division Gone Wrong. pg. 156 - 157. What is cancer?. Cells have genes that control when they undergo mitosis If one of these genes is damaged (mutated), a cell will do mitosis uncontrollably which forms a tumour There are 2 types of tumours: Benign Malignant.

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Cancer: Cell Division Gone Wrong

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  1. Cancer: Cell Division Gone Wrong pg. 156 - 157

  2. What is cancer? • Cells have genes that control when they undergo mitosis • If one of these genes is damaged (mutated), a cell will do mitosis uncontrollably which forms a tumour • There are 2 types of tumours: • Benign • Malignant

  3. Tumours (neoplasms)

  4. Benign tumours • Benign tumours cannot invade neighbouring tissues and therefore are NOT cancerous

  5. Malignant tumours (cancer) • Malignant tumours ARE cancerous because they can invade neighbouring tissues • Malignant tumours may metastasize if cells break away from the tumour and lead to the formation of tumours elsewhere in the body

  6. Possible causes of cancer • Abnormal cell growth my be caused by a variety of sources • Heredity • Carcinogens Carcinogen – an agent directly involved in causing cancer eg. radiation overexposure, smoking, certain viral infections

  7. Cancer Treatment • There are 3 main routes of cancer treatment: • Surgery • Radiation • Chemotherapy • There is NO magic bullet cure • Prevention is EVERYTHING

  8. Try this… • Tick, Tock, Goes the clock (pg. 118) • What is a telomere and why are they important? • In what way does a telomere act as a ‘mitotic clock’? • What kind of molecule is telomerase and what does it do? • What may a build up of short telomeres lead to? • Why are cancer cells often described as being ‘immortal’?

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