1 / 22

APBIO- Chpt 12 Cell Division Overview- Part 2

APBIO- Chpt 12 Cell Division Overview- Part 2. Warm-Up : List where the 3 checkpoints occur in cell cycle of a cell carrying out mitosis. Objectives. (1) The student will be able to compare and contrast binary fission and mitosis .

oliana
Download Presentation

APBIO- Chpt 12 Cell Division Overview- Part 2

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. APBIO- Chpt 12 Cell Division Overview- Part 2 Warm-Up: List where the 3 checkpoints occur in cell cycle of a cell carrying out mitosis.

  2. Objectives • (1) The student will be able to compare and contrast binary fission and mitosis. • (2) The student will be able to list and describe how some eukaryotes reproduce through mitosis. • (3) The student will be able to identify internal and external factors that regulate cell division. • (4) The student will be able to explain cancer in terms of the cell cycle.

  3. Cell Division in Prokaryotes • Binary fission is similar in function to mitosis. • Asexual reproduction is the creation of offspring from a single parent. • Binary fission produces two daughter cells genetically identical to the parent cell. • Binary fission occurs in prokaryotes.

  4. Reflection • (1) Compare and contrast binary fission and mitosis.

  5. Asexual Reproduction • Environment determines what form of reproduction is most advantageous. • Asexual reproduction is an advantage in consistently favorable conditions. • Sexual reproduction is an advantage in changing conditions.

  6. Asexual Reproduction • Some eukaryotes reproduce through mitosis. • Budding forms a new organism from a small projection growing on the surface of the parent.

  7. Asexual Reproduction • Fragmentation is the splitting of the parent into pieces that each grow into a new organism. • Vegetative reproduction forms a new plant from the modification of a stem or underground structure on the parent plant.

  8. Reflection • (2) List and describe how some eukaryotes reproduce through mitosis.

  9. Regulation of the Cell Cycle • Internal and external factors regulate cell division. • External factors include physical and chemical signals. • Growth factors are proteins that stimulate cell division. • Most mammal cells form a single layer in a culture dish and stop dividing once they touch other cells.

  10. Regulation of the Cell Cycle • Two of the most important internal factors are kinases and cyclins. • External factors trigger internal factors, which affect the cell cycle.

  11. Regulation of the Cell Cycle • Apoptosis is programmed cell death. • a normal feature of healthy organisms • caused by a cell’s production of self-destructive enzymes • occurs indevelopmentof infants

  12. Reflection • (3) Identify internal and external factors that regulate cell division.

  13. Regulation of the Cell Cycle • Cell division is uncontrolled in cancer. • Cancer cells form disorganized clumps called tumors. • Benign tumors remain clustered and can be removed. • Malignant tumors metastasize, or break away, and can form more tumors.

  14. Regulation of the Cell Cycle • Cancer cells do not carry out necessary functions. • Cancer cells come from normal cells with damage to genes involved in cell-cycle regulation.

  15. Regulation of the Cell Cycle • Carcinogens are substances known to promote cancer. • Standard cancer treatments typically kill both cancerous and healthy cells.

  16. Mini Virtual Lab • CANCER • In this quick virtual lab you will compare normal cells with cancerous cells and observe the differences between them. • PURPOSE • Students will observe and compare normal cells and cancerous cells. • PROBLEM • How do normal and cancerous cells compare? • MATERIALS • Computer images to include: slides of normal cells and slides of cancerous cells

  17. Mini Virtual Lab • PROCEDURE • 1. Examine slides of normal cells under the microscope using virtual computer images. Draw and describe your observations. • 2. Repeat step 1 with virtual computer slides of cancer cells.

  18. NORMAL HUMAN SKIN CELLS

  19. Skin Cells- Another Use • Human skin cells can provide stem-cell-like properties.

  20. HUMAN SKIN CANCER CELLS

  21. Mini Virtual Lab • ANALYZE & CONCLUDE • Compare. How does the structure of the normal cells compare with the structure of the cancerous cells for each of the slides you viewed? • Infer. Cancer cells not only appear different from normal cells but they also divide more rapidly. Why do you think chemotherapy, a common treatment for cancer, results in the loss of hair?

  22. Reflection • (4) Explain cancer in terms of the cell cycle.

More Related