PPT-Unit III: Cells Part IV: Cell division & cancer

Intro Your skin cells are constantly dividing Why Vocab DNA genetic material Chromosome Coiled DNA that is passed from one generation of cells to the next Chromatid one of two identical sister parts of a duplicated chromosome. A Disease of Mitosis. 1. Cancer: a Disease of Mitosis. Cancer is a . disease of . mitosis – resulting in uncontrollable mitotic division.. Cells do not live forever, and they will reach a point where they will . Foundations of Science. Vocabulary. Apoptosis: programmed cell death. Metastasis: spreading of cancerous cells to other parts of the body. Cancer. Cells that no longer respond to the signals that control growth an death. A Disease of Mitosis. 1. Cancer: a Disease of Mitosis. Cancer is a . disease of . mitosis – resulting in uncontrollable mitotic division.. Cells do not live forever, and they will reach a point where they will . Efficiency . Smaller the cell = quicker it can work. Transport of Substances. Cellular communication. Ratio of surface area to volume. Other reasons for cellular division. Growth. Replace damaged cells. Why do cells need to divide?. Growth and development. You started as 1 cell and now you’re made up of roughly 40 TRILLION cells. Repair and regeneration of tissue. Reproduction. What happens when cells divide? . &. Cellular Division. I. Cell Division:. . All . cells. are derived from preexisting cells (Cell Theory) . Cell division . is the process by which cells produce new cells . I. Cell Division:. . All organisms come from one cell. Largest: Ostrich Egg. Smallest: Red Blood Cell. Longest: Nerve Cell . Where do cells come from?. Another cell: . Asexual Reproduction. Exact copy of the cell. A combination of cells:. to the cell theory: all cells come from preexisting cells. . Why, when and how . cells divide is the subject of this unit..  . Reproduction. Cells reproduce in order to make new cells.. A bacterium divides to become two bacteria.. Chapter 10. In Your Notebook. Materials move through cells by diffusion. Oxygen and food move . into cells. , while waste products move out of cells. How does the size of . a cell . affect how . efficiently . Topic 1: DNA Organization. By the end of this topic, you should be able to…. Identify parts of a chromosome. Explain why DNA has to copy and coil before cell division. Explain why cells cannot continue to grow forever. Unit 7 - Mitosis. Mitosis. All cells in your body divide. In children and teens, cells divide to assist in growth. In adults, cells divide to replace old cells. Your cells are really good at knowing when they should and shouldn’t divide. Chapters 12, 13, 16, 17. Limits to Cell Growth. The larger a cell becomes, the more demands a cell places on its DNA. If extra copies of DNA are not made, an “information crisis” would occur. The cell also has more trouble moving nutrients and wastes across the cell membrane. Alexey Khodjakov. Wadsworth Center. Genet. Mol. Biol. vol.22 n.4 São Paulo Dec. 1999. Karyotype of Pancreatic Cancer Cells. What do you notice that appears odd amongst these chromosomes? HINT: What should a normal karyotype look like? . 1. Cell division. Mitosis. Cell division functions in reproduction, growth, and repair. In unicellular organisms, the division of one cell to form two reproduces . an entire . organism (e.g., bacteria, yeast, .