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Aim: How can mitosis lead to a disruption in homeostasis?

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Aim: How can mitosis lead to a disruption in homeostasis? Understanding Cancer What could have caused this? Cancer Approximately 200 types Can you think of some? – PowerPoint PPT presentation

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Title: Aim: How can mitosis lead to a disruption in homeostasis?


1
Aim How can mitosis lead to a disruption in
homeostasis?
Understanding Cancer
2
What could have caused this?
Cancer
3
Approximately 200 types
Prostate cancer
Breast cancer
Lung cancer
Skin cancer
  • Can you think of some?

4
Healthy cells
  • Grow, divide, and replace themselves during the
    process of mitosis. Each mitotic division leads
    to the development of 2 NEW healthy cells.

5
How do cells divide by mitosis?
6
Abnormal cell division
  • Normal cells lose their ability to limit and
    direct their growth. They divide too rapidly and
    grow without any order.

7
What happens if cells are unable to regulate the
cell cycle?
Cancer is a disease that is caused by loss of
control of the cell cycle. Cells continue to
divide uncontrollably.
8
Cancer
  • Cancer uncontrolled cell division
  • Tumors (lumps or masses of cancerous cells) will
    result because of this uncontrolled cell
    division.
  • Tumors can be either malignant (spread -
    dangerous) or benign (cant spread safe)

9
Metastasize
  • Cancer cells also can spread, to other parts of
    the body and form new tumors.
  • How do they spread?

They spread by using the circulatory system and
lymph nodes.
10
How cancer spreads
11
What causes cancer?
  • Damage to the cells DNA from
  • Poor Diet
  • Certain Pathogens (Viruses)
  • Genetics
  • UV Radiation (Sun)
  • Drugs (Tobacco)
  • Mutations - to genes, the cell's instructions for
    making the proteins it needs to survive, grow and
    multiply.
  • Ultraviolet radiation
  • Viruses
  • Usually cancer is not inherited
  • Carcinogens chemicals

12
Anatomy of a Cigarette
  • Smoking causes a third of all cases of cancer
  • Cigarette smoke contains 3000 different
    chemicals, some of which are carcinogens. Some
    people have a lower risk of developing lung
    cancer. Their cells may be more efficient at
    repairing the gene damage caused by the
    carcinogens.

13
Lung Cancer
Healthy Lung
Cancerous Lung
14
Treatment
  • Surgery physical removal of the malignant tumor
  • Radiation disrupts cell division
  • Chemotherapy drugs that prevent cell division by
    interfering with mitosis
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