1. A View of the Cell Chapter 7

2. Background Info Cells = smallest unit that can carry life processes 1665 Robert Hooke first observed cells using light microscope Leeuwehoek first observed living cells with a better crafted lens

3. Light Microscopes (p. 171) Compound Light Microscope = uses lenses to magnify objects, can magnify up to 1500 times

4. Electron Microscopes (p. 172) Electron Microscope = uses a beam of electrons instead of light to magnify structures, can magnify up to 500,000 times

5. SEM = scanning electron microscope, scans the surface of cell TEM = transmission electron microscope, allows view within cell

6. Cell Theory (p.172) 1. All living organisms are comprised of one or more cells.

7. 2. Cells are the basic units of structure, function, and organization in an organism.

8. 3. Cells come only from preexisting cells.

9. Types of Cells (p.173) 1. Prokaryotes = bacteria cells No true nucleus, not membrane bound Nucleoid = unbound ball of DNA 2 Domains –Archaea = similar to 1 st forms on life on earth –Eubacteria = more closely related to eukaryotic cells

11. 2. Eukaryotes = plant & animal cells with a true membrane bound nucleus Organisms made up of one or more cells Membrane bound organelles Organelles = well-defined structures, perform specific functions, usually surrounded by membrane Larger than prokaryotic cells

12. Eukaryotic Cell

13. Plant vs. Animal Cell

14. Basic Parts of A Cell Plasma Membrane = cell membrane, barrier between outside & inside. “Fluid Mosaic Model”

15. Cytoplasm = fluid (cytosol) and organelles inside the cell Nucleus = membrane bound organelle containing DNA

16. Compare and Contrast Eukaryotic and Prokaryotic Cells