1 31 12 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
1/31/12 PowerPoint Presentation
Download Presentation
1/31/12

Loading in 2 Seconds...

play fullscreen
1 / 13

1/31/12 - PowerPoint PPT Presentation


  • 92 Views
  • Uploaded on

1/31/12. Objectives Structure v. function connection Stem cells primer Do now: Assemble in three or four groups of 2-3 students Do later: Catch up on missing work (RRQ 1-5, mitosis picture, organelle picture, organelle quiz , plasmolysis lab, etc.). Diversity of Cells.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about '1/31/12' - beau-johnson


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
1 31 12
1/31/12
  • Objectives
    • Structure v. function connection
    • Stem cells primer
  • Do now: Assemble in three or four groups of 2-3 students
  • Do later: Catch up on missing work (RRQ 1-5, mitosis picture, organelle picture, organelle quiz, plasmolysis lab, etc.)
diversity of cells
Diversity of Cells
  • In groups, answer the following 4 questions about your type of cell:
    • What is the function of this cell?
    • How does this cell perform its function?
    • What is unique about the structure of this cell?
    • How does the cell’s structure enable it to perform its function?
diversity of cells1
Diversity of Cells
  • Over 250 specialized cell types in our bodies.
    • Where do they come from?
    • Stem cells
stem cells
Stem cells
  • Stem cells are “blank cells” that have the ability to produce one or more types of specialized cells.
stem cells1
Stem cells
  • Differentiation is the process by which a stem cell produces a more specializedcell.
differentiation
Differentiation
  • How does differentiation occur?
    • All cells have a full set of DNA
      • Instructions to make our whole body
    • As stem cells differentiate, many genes get “turned off,” except for the genes needed to make that differentiated cell.

DNA – “switched on”

DNA – “switched off”

embryonic stem cell research
Embryonic Stem Cell Research
  • Embryos have stem cells that can produce all adult cells.
  • Research application
    • Watch how ESCs grow to learn about human development
stem cells2
Stem Cells
  • Four different levels of stem cells
    • Totipotent – can produce all adult cells & placenta
    • Pluripotent – can produce all adult cells (not placenta)
    • Multipotent – can produce related families of cells
      • E.g. hematopoietic stem cells  blood
    • Unipotent – can produce one kind of cell
      • E.g. liver cells, hair cells
induced pluripotent stem cells
Induced Pluripotent Stem Cells
  • 2008 – Successful conversion of adult cells back into pluripotent stem cells
    • Potential to re-grow your own tissues and organs