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Sci 9 Lesson 3 Feb 25 - Ch 5.1 Cytokinesis, Checkpoints in the Cell Cycle, and Cancer

Sci 9 Lesson 3 Feb 25 - Ch 5.1 Cytokinesis, Checkpoints in the Cell Cycle, and Cancer



BC Science 9

BC Science 9
Ch. 5.1 Cytokinesis, Checkpoints in the Cell Cycle, and Cancer
pp. 158-161



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    Sci 9 Lesson 3 Feb 25 - Ch 5.1 Cytokinesis, Checkpoints in the Cell Cycle, and Cancer Sci 9 Lesson 3 Feb 25 - Ch 5.1 Cytokinesis, Checkpoints in the Cell Cycle, and Cancer Presentation Transcript

    • Homework from last class:
      • Complete the Mitosis, Stages of the Cell Cycle, and The Cell Cycle worksheets from the handout
      • Study for Quiz on Ch. 5.1 – The Cell Cycle and Mitosis (pp. 150-157)
      • Inform me of your Mitotic Movies group
      • Bring field trip forms and $
      • Read over class notes and check out the class blog: http:// msoonscience.blogspot.com /
    • Ch. 5.1 Quiz You have ~7 minutes to write the quiz. Good luck!
    • Field Trip – March 1 UBC Michael Smith Labs
      • Meet in front of the UBC Bookstore at 8:45am
      • We will walk to the Michael Smith Labs together (right beside UBC Bookstore)
    • Cytokinesis, Checkpoints in the Cell Cycle, and Cancer Chapter 5.1 pp. 158-161
    • Cytokinesis
      • cytokinesis: the final stage of the cell cycle; separates the 2 nuclei and cell contents into 2 daughter cells.
      • New cells are identical to the parent cell.
      Parent cell (in telophase) 2 identical daughter cells
      • Animal cells – cell membrane pinches together to divide the cell’s cytoplasm and organelles
      • Plant cells – a cell plate forms along the centre of the cell to divide the cell into 2 daughter cells
    • Checkpoints in the Cell Cycle
      • Activities in the cell cycle are monitored and controlled at specific stages (checkpoints).
      • Proteins at these checkpoints monitor cell activities
      • send info to nucleus
      • instructs the cell whether or not to divide
      • Cells will not divide if:
      • Not enough nutrients to support cell growth
      • DNA in nucleus has not been replicated
      • DNA is damaged
    • Checkpoints in the Cell Cycle p. 159
    • Control of the Cell Cycle
      • http://nobelprize.org/educational/medicine/2001/cellcycle.html
    • Activity time! Group 1: Onion Root Lab Activity Group 2: Cancer Investigation
    • Activity Instructions:
      • I will divide you into 2 groups.
      • Group 1 will begin with the Onion Root Lab activity at the back of the class.
      • Group 2 will begin with the Cancer Investigation at the front of the class.
      • After 20 minutes, the groups will switch activities.
      • Complete your worksheets at each station.
    • Cancer
      • Checkpoints in the cell cycle can stop the cell from growing and dividing .
      • Mutagens (ex. viruses, X rays, UV light, chemicals) can cause mutations in a cell and harm the organism.
      • If a mutation occurs in a gene producing the instructions for a checkpoint protein , cell cycle control will be lost  can lead to uncontrolled division (cancer)
      • Healthy cells stop dividing when they receive messages from neighbouring cells; cancer cells do not respond to messages from nearby cells  continue to divide  tumour
      p. 161
      • Cancer cells are not specialized , but release chemicals to attract small nearby blood vessels  branch into the tumour to deliver nutrients  feed tumour  tumour growth
      • Cancer can spread to other parts of the body if some tumour cells break away  carried by the blood vessels to a new location  can form another tumour
      • Cancer cells have large, abnormal nuclei because cell division checkpoints no longer function  chromosomes do not divide correctly
    • Cancer Animations
      • http://science.education.nih.gov/supplements/nih1/cancer/activities/activity2_animations.htm
    • Homework for next class:
      • Complete the Onion Root Lab Activity and The Cell Cycle and Cancer worksheet (if not already completed)
      • Read notes on Cancer on the class blog (in this slideshow)
      • Keep working on your Mitotic Movies project
      • Bring field trip forms and $ ASAP
      • Read over class notes and check out the class blog: http://msoonscience.blogspot.com/
      • Have a great weekend!
    • Works Cited
      • Images taken from the following sources:
      • http://www.biologyreference.com/Co-Dn/Cytokinesis.html
      • http://www.phschool.com/science/biology_place/labbench/lab3/cytokin.html
      • http:// www.nccs.com.sg/kac/abcs/detect.htm
      • http://www.phd7.idaho.gov/Infectious%20Disease/infectiousdiseasemain.html
      • http://www-ipcms.u-strasbg.fr/spip.php?article647
      • http://science.education.nih.gov/supplements/nih1/cancer/activities/activity2_animations.htm
      • http://www.microscopy-uk.org.uk/micropolitan/botany/frame4.html