Apbio chpt 12 cell division overview part 2
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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

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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.


Normal human skin cells

NORMAL HUMAN SKIN CELLS


Skin cells another use

Skin Cells- Another Use

  • Human skin cells can provide stem-cell-like properties.


Human skin cancer cells

HUMAN SKIN CANCER CELLS


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.


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