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Class Topics

Hand in W.S. “ Structure and Function of Cells ” before the bell rings. Review Microscope lab Microscope quiz Notes: Cells Surface Area:Volume Eukaryotic, prokaryotic, cell parts “Obstacles are those frightful things you see when you take your eyes off your goal.” Henry Ford.

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Class Topics

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  1. Hand in W.S. “Structure and Function of Cells” before the bell rings. Review Microscope lab Microscope quiz Notes: Cells Surface Area:Volume Eukaryotic, prokaryotic, cell parts “Obstacles are those frightful things you see when you take your eyes off your goal.” Henry Ford To learn about microscopes and scientists that discovered cells and cell parts. Title: Biology 10/12/06 Class Topics Objectives: Wednesday, January 1, 20207:10 AM

  2. Class Assignments What By When • Microscope quiz 10/12/06 • W.S. “Structure and Function of Cells” 10/12/06 • Chapter 3 Quiz 1 10/16/06 • Read 55-61 10/16/06 • W.S. 3.2 (DR/Quiz) 10/16/06 • Due this class period • Due next class period • Due in the future

  3. 1A & 4B Grade Sheet

  4. 2A Grade Sheet

  5. 3A Grade Sheet

  6. 4A Grade Sheet

  7. Postquiz Activities • Hand in quiz • Pick up W.S. 3.2 from the lab stool • Choose from the following: • Read 55-61 • Correct homework • Work on W.S. 3.2

  8. Cell Theory • All living things are composed of one or more cells. • Cells are the basic units of structure and function in living things. • All cells come from preexisting cells.

  9. Cell SizeMath lab – p. 56 • Most organisms have many small cells rather than fewer large ones • Why? • Surface area-to-volume ratio • 6:1 good • 3:1 very large for cells • Any lower than this is very dangerous • Allows transfer of materials in and out of cell easily • Cell size = small, SA:Vol = high • Cell size = large, SA:Vol = low

  10. Chapter 3 Quiz 1 Review • List the cell theory • Matching • Scientists: Hooke, van Leeuwenhoek, Schleiden, Schwann, Virchow • Short answer • Microscopes • Differences – electron microscopes • Advantages/disadvantages… • Image produced by… • Long answer • Surface area:volume

  11. All cells have… • Cell membrane – around outside • Cytoplasm – fluid of cell • Cytoskeleton – structure of cell • Ribosomes – make protein • DNA – used to make protein • Some lose these after time due to specialization

  12. Prokaryotes Bacteria • Single-celled organism • Lacks nucleus and membrane bound organelles* • DNA in a circular loop • Not chromosomes • Cell wall • *An organelle is a structure within a cell that performs a specific function

  13. Eukaryote • Organism that has cells with nuclei and internal compartments (membrane boundorganelles) • ex. animals, fungi, plants, protists • Internal membranes connect organelles • Vesicles • Small cavity to move materials around cell

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