Cell Notes

1
Cell Notes
2
Cell Theory

• All living things are composed of cells.
• Cells are the basic units of structure and
  function in living things.
• New cells are produced from existing cells

If we can understand how the cell works, then
we can understand how the creature works.
3
2 Types of Cells

• Prokaryotic
• Cells without well-defined nucleus
• Eukaryotic
• Cells with a membrane enclosed, well-defined
  nucleus

4
Number of Cells Possible

• Unicellular
• How many cells do you think these organisms have?
• Multicellular
• How many cells do you think these have?

5
Size of cells

• Are cells small or big or somewhere in between?
• SMALL
• Why are cells small regardless of the size of the
  organism?

6
Cells are like a Factory
7
Cell
8
Organelles (8 that both have)

• Nucleus (Main Office)
• The control center for all cell activities
• Picture of a Nucleus
• Cell Membrane (Front Door)
• Controls entrance into the cell

9
Organelles (8 that both have)

• Mitochondria (Local Power Plant)
• Produces cellular energy called ATP
• Golgi Apparatus (Shipping)
• Packages Sorts macromolecules for delivery to
  organelles or secretion

10
Organelles (the 8 continued)

• Endoplasmic Reticulum (ER)
• Conveyer Belt
• Highway system within cell. Also involved in
  Protein Synthesis
• Ribosome (Machine)
• Maker of protein

11
Organelles (the 8 continued)

• Cytoskeleton (Support Beams ) Cytoplasm (Factory
  minus the Nucleus)
• Used to keep cell shape

12
Organelles (Plant Only)

• Cell Wall
• Rigid Outer covering prevents gravity from
  crushing cell
• Chloroplast
• Captures energy for the cell, site of
  photosynthesis

13
Organelles (Plant Only)

• Vacuole (Storage Closet)
• Large empty space used to help keep shape store
  extra water, food waste

14
Organelles (Animal Only)

• Lysosome (Custodians)
• Packages digests macromolecules
• Centrioles (Secretaries)
• Organizing centers for cell division

15
Examples
Cell Membrane
Cheek Cells
Onion Skin Cells
Nucleus
Cell Wall
Potato Cells
16
Review

• What are the three main parts of the cell theory?
• What are the two types of cells?
• What is the difference between them?
• Are we unicellular or multicellular?