1. A View of the Cell
Chapter 7

2. Think, Pair, Share What 2 parts of the microscope magnify?
What 2 parts of the microscope focus?
If the objective is 10X and the occular is 10X, what is the magnification?

3. 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

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

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

6. SEM = scanning electron microscope, scans the surface of cell
TEM = transmission electron microscope, allows view within cell
Lymphocyte, red blood cell in a capillary

7. Think, Pair, Share 4. A scientific theory is based on ?
5. A scientific law is based on ?
6. True or False – Scientific Theories become Scientific Laws.

8. Cell Theory (p.172)
1. All living organisms are comprised of one or more cells.
Slender loris, amoeba, pitcher plant

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

10. 3. Cells come only from preexisting cells.

11. Think, Pair, Share
7. List characteristics that scientists would use to classify cells.

12. 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 1st forms on life on earth
Eubacteria = more closely related to eukaryotic cells

14. 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

15. Eukaryotic Cell

16. Plant vs. Animal Cell

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

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

19. Compare and Contrast Eukaryotic and Prokaryotic Cells