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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 .

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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
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.
cell division in prokaryotes
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.

reflection
Reflection
  • (1) Compare and contrast binary fission and mitosis.
asexual reproduction
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.
asexual reproduction1
Asexual Reproduction
  • Some eukaryotes reproduce through mitosis.
    • Budding forms a new organism from a small projection growing on the surface of the parent.
asexual reproduction2
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.
reflection1
Reflection
  • (2) List and describe how some eukaryotes reproduce through mitosis.
regulation of the cell cycle
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.
regulation of the cell cycle1
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.
regulation of the cell cycle2
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
reflection2
Reflection
  • (3) Identify internal and external factors that regulate cell division.
regulation of the cell cycle3
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.
regulation of the cell cycle4
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.
regulation of the cell cycle5
Regulation of the Cell Cycle
  • Carcinogens are substances known to promote cancer.
  • Standard cancer treatments typically kill both cancerous and healthy cells.
mini virtual lab
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
mini virtual lab1
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.
skin cells another use
Skin Cells- Another Use
  • Human skin cells can provide stem-cell-like properties.
mini virtual lab2
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?
reflection3
Reflection
  • (4) Explain cancer in terms of the cell cycle.