1. A tour of the Cell Chapter 7 http://www.youtube.com/watch?v=o1GQyciJaTA&feature=related http://www.ibiblio.org/virtualcell/textbook/chapter3/chapter3.htm http://vcell.ndsu.edu/animations/

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. Eukaryotic vs. prokaryotic cells  Contains nucleus  Many organelles present  10-100 micrometers  Appeared later in the fossil record  Lacks a nucleus  Lacks organelles  1-10 micrometers  Appeared earlier in the fossil record

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

6. ProkaryotesEukaryotes Cell membrane Ribosomes Nucleus Endoplasmic reticulum Golgi apparatus Lysosomes Vacuoles Mitochondria Cytoskeleton Compare and Contrast

7. Page 206

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

9. Cell Membrane   Composed of proteins and a type of lipid called phospholipid   The structure that makes the plasma membrane is called the phospholipid bilayer http://www.wisc-online.com/Objects/construction-of-the-cell-membrane/

10. Phospholipid molecule of Plasma Membrane

11. Plasma Membrane Structure

12. Ways cells get molecules in and out of cell No cell energy used Diffusion Facilitated diffusion Cell energy used Active transport http://www.wisc-online.com/Objects/construction-of-the-cell-membrane/

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

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

15. 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: diffusion of water through a membrane – –Facilitated diffusion: Transport proteins provide a pathway for certain molecules to pass Active transport

16. Water moves from high concentration to low concentration

18. What happens to a red blood cell when it is placed in water with different concentrations of salt?

19. Results of water movement on cells – Osmotic Pressure

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. Bulk Transport For larger molecules and solid clumps of material the cell uses Endocytosis – cell takes in materials in by infoldings in the membrane Endocytosis – cell takes in materials in by infoldings in the membrane Phagocytosis Phagocytosis Exocytosis – cell releases materials through membrane Exocytosis – cell releases materials through membrane http://www.ibiblio.org/virtualcell/textbook/chapter3/cmf4a.htm http://www.ibiblio.org/virtualcell/textbook/chapter3/cmf4a.htm http://www.ibiblio.org/virtualcell/textbook/chapter3/cmf4a.htm http://www.youtube.com/watch?v=aWItglvTiLc http://www.youtube.com/watch?v=aWItglvTiLc http://www.youtube.com/watch?v=aWItglvTiLc

22. Main cell parts and functions

23. Cytoplasm: holds organelles - transport medium

24. Nucleus: Control center – contains the DNA (genetic material)

25. Ribosomes: make proteins

26. Ribosome

27. RER: modify and transport proteins

28. SER: Production of lipids (fats)

29. Golgi apparatus: Process and package proteins and lipids

30. Chloroplast: Where photosynthesis occurs

31. Mitochondria: Release energy usable by the cell

32. Lysosome: Breaks down macromolecules into particles the cell can use

33. Homeostasis (homeo_=same _stasis=standing still) Unicellular organisms as well as cells in multicellular organisms must maintain homeostasis, or that is to say, relatively constant physical or chemical conditions. Unicellular organisms Unicellular organisms Multicellular organisms Multicellular organisms

34. To maintain Homeostasis Unicellular organisms Unicellular organisms –Grow –Respond to environment –reproduce Multicellular organisms Multicellular organisms –Have specialized cells that communicate with each other

35. Examples of Homeostasis in humans Thermoregulation Thermoregulation Glucose regulation Glucose regulation

36. Cell Specialization In multicellular organisms there is a division of labor among the specialized cells In multicellular organisms there is a division of labor among the specialized cells

37. Levels of Organization cell tissueorgan organ system organism

38. Homeostatic loops http://www.youtube.com/watch?v=jkioZCDHT_E&list=PL7A750281106C D067&index=38 http://www.youtube.com/watch?v=jkioZCDHT_E&list=PL7A750281106C D067&index=38

39. Examples of Homeostasis in humans