Presentation on theme: "LN #15 Cancer & Cell Cycle. The Cell Cycle Interphase –Period of cell growth and DNA replication Mitosis –Period of cell division Prophase, metaphase,"— Presentation transcript:
LN #15 Cancer & Cell Cycle
The Cell Cycle Interphase –Period of cell growth and DNA replication Mitosis –Period of cell division Prophase, metaphase, anaphase, telophase Cytokinesis –Cytoplasm is divided
cytokinesis metaphase telophase anaphase
What part of the cell cycle is it? interphase cytokinesis metaphase anaphase prophase telophase
What controls the normal cell cycle? Enzymes –Some begin the cell cycle –Others control the cell cycle –Others control the cycle at every phase What are enzymes? –A type of protein that speeds up chemical reactions
Abnormal Cell Cycle: Cancer Cancer is the uncontrolled growth and division of cells. Cancer cells can kill an organism by crowding out normal cells, resulting in the loss of tissue function.
What Causes Cancer? The changes that occur in the regulation of cell growth and division of cancer cells are due to mutations. Various environmental factors can affect the occurrence of cancer cells. Genetics Problems with enzyme production Some Viruses Environmental factors Cigarette smoke, air and water pollution, UV exposure
Summary 1.What are the parts of the cell cycle? 2.What are the parts of mitosis? 3.What controls the cell cycle? 4.What is cancer? 5.How can cancer cells kill an organism? 6.What causes cancer?