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Week 13, Day One

Week 13, Day One. HW # 43 - Compare the L (in your KWL) to what is said on pgs. 84 & 85 of your text. Add any additional information that you feel is important. Perform your Cell Theory Rap for a friend/parent/sibling/pet. Warm up

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Week 13, Day One

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  1. Week 13, Day One HW # 43- Compare the L (in your KWL) to what is said on pgs. 84 & 85 of your text. Add any additional information that you feel is important. Perform your Cell Theory Rap for a friend/parent/sibling/pet. Warm up (collect last week’s warm up & parent letter) Where do cells come from? How do you know?

  2. Warm up Response

  3. Homework Response/Check Did you complete your Fiber Identification lab conclusion? If not, put it in your Panther Planner to complete.

  4. Goals for Today • Cell Theory

  5. KWL

  6. The Cell Theory Hairy T-cell

  7. Definition There are 3 parts to cell theory. 1.All living things are made of cells.

  8. Part 2 of the Theory 2. The cell is the basic structural and functional unit of life.

  9. Part 3 of the Theory 3. All cells come from pre-existing cells. yeast cells dividing

  10. Who came up with this theory? All plants are made of cells! 1. Schleiden (circa 1838) Onion skin cells

  11. Who came up with this theory? All animals are made of cells! 2. Schwann Human red blood cells

  12. Who came up with this theory? 3. Virchow All cells come from pre-existing cells!

  13. How big are cells? • Microscopic (mostly) • Measured in microns µm • (micrometers). • A µm is one millionth of a meter = • 10-9 m = one thousandth of 1 mm.

  14. How big are cells? Smallest free-living cell = Mycoplasma genitalium Size = 0.2 to 0.3 µm

  15. How big are cells? • Bacteria e.g. Eschericia coli (aka E.coli) • Size=1 µm by 3 µm

  16. How big are cells? • Human red blood cell = 8 µm in diameter

  17. How big are cells? • Largest cell on the human body = ovum • Size= • 1000 µm in diameter (1 mm)

  18. How big are cells? • Smallest cell in the human body = sperm cell.

  19. How big are cells? • Largest cell with a metabolism = Chaos chaos Size=1-5 mm in length. common name = Giant Amoeba Chaos diffluens, is an amoeba closely related to the giantamoebae

  20. How big are cells? • Largest cell = yolk of an ostrich egg

  21. Ostrich, egg, humans

  22. Ostrich emerged from egg

  23. How can we study cells? Problem: They are microscopic! Solution: Use a microscope!

  24. Types of Microscopes • Compound light microscope • Light passes through lenses to magnify image up to 1000X • Can observe living cells

  25. Types of Microscopes 2. Electron microscope • Uses a beam of electrons to magnify image > 1000X • Kills cells being observed

  26. Cell Theory Rap http://www.youtube.com/watch?v=wiZFCMrx4Kg&noredirect=1

  27. Common features of all cells Small size – allows materials to move via diffusion • Diffusion = process by which molecules move from levels of high concentration to levels of low concentration until equilibrium is reached

  28. Diffusion • Google Image Result for http://www.indiana.edu/~phys215/lecture/lecnotes/lecgraphics/diffusion.gif

  29. Common features of all cells 1. Cell Membrane – selectively/differentially permeable (lets some things in and out)

  30. Common features of all cells 2.Cytoplasm – semi-fluid material in which cell organelles float

  31. Common features of all cells 3. Nucleic acid containing genetic code : Which nucleic acid? DNA

  32. Common features of all cells 4. Cytoskeleton – proteins that support the cell (Microtubules & microfilaments)

  33. Common features of all cells 5. Ribosomes – make proteins

  34. If Cells could be really big …… Star Trek - The Immunity Syndrome

  35. Bibliography • http://www.hotlinecancer.com/?cat=28 • http://news.bbc.co.uk/1/hi/sci/tech/4636121.stm • http://www.thebacteriabusters.com/eColi.html • http://www.lungcancer.co.uk/how.htm • http://www.fi.edu/learn/heart/blood/red.html • http://biology.about.com/library/weekly/aa091400a.htm • http://www.pbs.org/wgbh/amex/babies/peopleevents/e_ovum.html • http://www.dkimages.com/discover/Home/Animals/Birds/Growth-and-Development/Ostrich/Ostrich/Ostrich-15.html • http://www.flickr.com/photos/71751551@N00/1262329163/ • http://commons.wikimedia.org/wiki/Image:Ostrich_egg.jpg • http://www.mambalam.net/slideshow.php?set_albumName=Animalia • http://strangebenevolent.blogspot.com/2007/07/meerkats-and-ostriches.html • www.madsci.org/posts/archives/dec97/878139903.Cb.r.html • http://en.wikipedia.org/wiki/Amoeba_proteus • http://en.wikipedia.org/wiki/The_Immunity_Syndrome_(Star_Trek

  36. Bibliography • http://www.pacpress.com/level3/micron.htm • Google Image Result for http://www.indiana.edu/~phys215/lecture/lecnotes/lecgraphics/diffusion.gif • http://commons.wikimedia.org/wiki/Image:Diffusion.jpg • http://library.thinkquest.org/C004535/cell_membranes.html • http://sun.menloschool.org/~cweaver/cells/e/ribosomes/ • http://www.elmhurst.edu/~chm/vchembook/580DNA.html • http://sciencecity.oupchina.com.hk/biology/student/glossary/cytoplasm.asp • http://www.uic.edu/classes/bios/bios100/lecturesf04am/lect06.htm

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