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Mitosis

Mitosis. What happens if it goes wrong?. Section 8.3 Summary – pages 211 - 213. Normal Control of the Cell Cycle. Sometimes the cells don’t stop dividing. This usually happens because of enzymes. Cancer is a malignant growth resulting from uncontrolled cell division.

virginia-ramirez
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Mitosis

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  1. Mitosis What happens if it goes wrong?

  2. Section 8.3 Summary – pages 211 - 213 Normal Control of the Cell Cycle • Sometimes the cells don’t stop dividing. • This usually happens because of enzymes. • Cancer is a malignant growth resulting from uncontrolled cell division.

  3. Section 8.3 Summary – pages 211 - 213 Normal Control of the Cell Cycle • Enzyme production is directed by genes located on the chromosomes. • A gene is a segment of DNA that controls the production of a protein.

  4. Section 8.3 Summary – pages 211 - 213 Cancer: A mistake in the Cell Cycle • Currently, scientists consider cancer to be a result of changes in one or more of the genes that produce substances that are involved in controlling the cell cycle. • Cancerous cells form masses of tissue called tumors. • Tumors steal food and gases from normal cells.

  5. Section 8.3 Summary – pages 211 - 213 Cancer: A mistake in the Cell Cycle • In later stages, cancer cells enter the blood and spread throughout the body, a process called metastasis. • This forms new tumors that disrupt the function of organs, organ systems, and ultimately, the organism.

  6. Section 8.3 Summary – pages 211 - 213 The causes of cancer • Genetic causes (that you inherit) • Environmental causes (UV light, asbestos, and other chemicals) • Viruses (HPV)

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