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Mitosis What happens if it goes wrong?. Section 8.3 Summary – pages 211 - 213 Normal Control of the Cell Cycle Cancer is a malignant growth resulting.

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Presentation on theme: "Mitosis What happens if it goes wrong?. Section 8.3 Summary – pages 211 - 213 Normal Control of the Cell Cycle Cancer is a malignant growth resulting."— Presentation transcript:

1 Mitosis What happens if it goes wrong?

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

3 Section 8.3 Summary – pages 211 - 213 Normal Control of the Cell Cycle Enzyme production is directed by genes located on the chromosomes. Enzyme production is directed by genes located on the chromosomes. A gene is a segment of DNA that controls the production of a protein. 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. 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. Cancerous cells form masses of tissue called tumors. Tumors steal food and gases from normal cells. 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. 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. 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) Genetic causes (that you inherit) Environmental causes (UV light, asbestos, and other chemicals) Environmental causes (UV light, asbestos, and other chemicals) Viruses (HPV) Viruses (HPV)

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