A View of the Cell

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Chapter 7

• A View of the Cell

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Chapter 7.1

• History of Cell Theory
• Microscope was in invented by Leeuwenhoek
  (1600s)
• Compound Light Microscope (up to 1500x)
• Hooke discovered the cell

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• D. Cell Theory was formed by Schleiden
  (botonist) and Schwann (zoologist)
• 1. 3 Parts
• a. all organisms are made of cells
• b. cell is basic unit of structure
• c. cells are from preexisting cells
• E. Electron microscope was invented in 1930s.
  (500,000x)

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• Two Basic Cell Types
• A. Prokaryotes
• 1. Unicellular
• 2. Evolved first
• 3. No nucleus
• 4. No membrane bound organelles

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• B. Eukaryotes
• 1. includes all multicellular
• 2. some unicellular
• 3. has a nucleus
• 4. has membrane bound organelles
• 5. generally 1-1000x bigger than
  prokaryotes

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Chapter 7.3

• Eukaryotic Cell Structure
• A. Cell Boundaries
• 1. cell wall- rigid and stiff
• 2. plasma membrane- flexible
• B. Cell Control
• 1. Nucleus contains
• a. Chromatin- DNA
• b. Nucleolus- make ribosomes

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• C. Working Parts and Products
• 1. Ribosomes- proteins
• 2. ER- transports and provides an area
  for chemical reactions
• 3. Golgi Body- Sorts and packages a.
  like a post office
• 4. Vacuole- storage
• a. big in plants-small in animals

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• 5. Lysosome- digestion
• 6. Chloroplast- photosynthesis
• a. contains chlorophyll (green)
• 7. Mitochondria- transforms energy
• a. known as powerhouse
• 8. Cytoskeleton- framework
• 9. Centriole- helps with mitosis
• 10. Cilia and Flagella- movement

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Difference between plant and animal cell?

• Plant Cell
• Ribosomes
• Mitochondria
• Nucleus
• ER
• Chloroplast
• Enlarged vacuole
• Cell wall

• Animal Cell
• Ribosomes
• Mitochondria
• Nucleus
• ER
• Centriole
• Small vacuoles