1. Chapter 6 http://www.youtube.com/watch?v=o1GQyciJaTA&feature=related
A tour of the Cell
Chapter 6

2. Cell theory All living things are composed of cells
Cells are the basic unit of function and structure in living things
All cells come from pre-existing cells

4. Main cell components Plasma membrane Cytoplasm Nucleus Organelles
Cell wall (only in plant cells)

5. Eukaryotic vs. prokaryotic cells
Contains nucleus
Many organelles present
micrometers
Appeared later in the fossil record
Lacks a nucleus
Lacks organelles
1-10 micrometers
Appeared earlier in the fossil record

6. Two Basic types Prokaryote Eukaryote Cell membrane cytoplasm
nucleus
Eukaryote
Cell organelles

7. Compare and Contrast Prokaryotes Eukaryotes Nucleus
Endoplasmic reticulum
Golgi apparatus
Lysosomes
Vacuoles
Mitochondria
Cytoskeleton
Cell membrane
Ribosomes
Cell wall

8. Pages

9. Compare/contrast plant and animal cells
Plant cell
ribosomes
mitochondria
Centrioles
lysosomes
Golgi apparatus
Cell wall
Large vacuole
Endoplasmic reticulum
Plasma membrane
chloroplast
nucleus

10. Plasma membrane
Composed of proteins and a type of lipid called phospholipid
The structure that makes the plasma membrane is called the phospholipid bilayer

11. Phospholipid molecule of Plasma Membrane

12. Plasma Membrane Structure

13. Ways cells get molecules in and out of cell
No cell energy used
diffusion
passive transport (facilitated diffusion)
Cell energy used
Active transport

14. Diffusion
The net movement of particles of a substance from where they are more concentrated to where they are less concentrated

15. Diffusion
The random movement of molecules from a high concentration to a low concentration
If system is left alone the molecules will eventually spread themselves equally every where – the molecules do not stop moving though

16. Types of Transport through plasma membrane
Passive transport
Diffusion: some molecules cross the plasma membrane with no expenditure of energy or help from transport proteins
Osmosis: difusion of water through a membrane
Facilitated diffusion: Transport molecules provide a pathway for certain molecules to pass
Active transport

17. OSMOSIS – MOVEMENT OF WATER THROUGH MEMBRANES
Water molecules
Higher Concentration
of Water
Lower Concentration
of Water
Sugar molecules
Water moves from high concentration to low concentration

19. Results of water movement on cells

20. Types of Transport through plasma membrane
Passive transport
Diffusion
Osmosis
Facilitated diffusion
Active transport: A transport protein pumps a solute across a membrane in the opposite direction to the way it travels with diffusion. It requires chemical energy.

21. Facilitated diffusion or Passive transport
Glucose
molecules
High
Concentration
Cell
Membrane
Low
Concentration
Protein
channel
Protein
channel
Used when the cell wants to make sure
it has lots of the molecule

22. Active Transport Low Energy from the cell is used High Energy
Molecule to
be carried
Molecules moved from
LOW concentration to HIGH
concentration
Low
Concentration
Cell
Membrane
High
Concentration
Molecule
being carried
Low
Concentration
Energy from the cell is
used
Cell
Membrane
High
Concentration
Energy
Energy

23. Main cell parts and functions

24. Cytoplasm: holds organelles - transport medium

25. Nucleus: Control center – contains the DNA

26. Ribosomes: make proteins

27. RER: modify and transport proteins

28. SED: Production of lipids (fats)

29. Golgi apparatus: Process and package proteins and lipids

30. Chloroplast: Where photosynthesis occurs

31. Mitochondria: Releases energy usable by the cell