1. Do Now List all the different types of cells you can think of. What do all of these cells have in common?

2. Cells & Microscopes

3. Development of the Cell Theory

4. What is a cell? A cell is the basic unit of life Organisms can be unicellular and multicellular, but all living things are made of CELLS!

5. History of the Cell Robert Hooke Anton van Leeuwenhoek Matthias Schleiden & Theodor Schwann Rudolf Virchow

6. The Cell Theory All living things are made of cells Cell is the basic unit of living things All cells come from pre-existing cells

7. Two classes of cells ProkaryoteEukaryote

8. All cells have… Plasma membrane Genetic material Cytoplasm Ribosomes (make proteins)

9. A B 1.Identify the prokaryotic and the eukaryotic cell. 2.Explain why you labeled each diagram as you did. 3.Which of the two cells is more likely to make up your body? 4.Which of the two is most likely a bacteria cell? 5.Is either of the cells from a plant? How do you know?

10. Sell a cell (part). Create an advertisement selling an organelle. Your ad must include: A colored, detailed picture A slogan A description of Which cells need it? (plant/animal? Eukaryote/prokaryote? All of the above?) Its function Its structure (what is it made of? What does it look like? How is it designed?) A reason to buy it (why do I need it?) Any add-ons or special features A price

12. Organelles & Cell Parts

13. The nucleus

14. Ribosomes – protein factories

15. ER, Golgi Apparatus, Vesicles

16. Vacuoles & Lysosomes

17. Mitochondria

18. Chloroplast

19. Plasma membrane Selectively permeable

20. Cell Wall

21. Cytoskeleton Microtubules or Microfilaments Enables cell to move or change shape Provide tracks for organelles to move Make the core of flagella & cilia

22. Cytoplasm

23. Look at your eggies! 1. CAREFULLY remove eggs from cups 2. CAREFULLY rinse off any excess stuff 3. CAREFULLY pat eggs dry and find final mass of your eggs. 4. Calculate percent change in mass ((mass f – mass i )/mass i ) *100

24. Do Now Do you remember which of the biomolecules from chapter 5 make-up cell membranes? LIPIDS! (and proteins) What is unique about the interaction between lipids and water? HYDROPHOBIC! Why do you think hydrophobic molecules like lipids make good cell membranes?

25. Structure of membrane All cells have a cell membrane!

26. Plasma Membrane Structure Made of proteins and phospholipids Phosphate head is hydrophilic 2 Fatty acid tails are hydrophobic *Which end is pushed away by water? Which end is attracted to water?

27. Plasma Membrane Structure Cell membrane is a phospholipid bilayer boundary between the watery inside and the watery outside of the cell

28. Proteins in the Membrane Proteins perform specific functions in membranes Enzymes carry out chemical rxns Cell-to-cell recognition Cell signaling Transport materials across membrane

29. Transport through membrane Some molecules pass easily, others need energy to “push” them through 2 types of transport Passive transport Active transport

30. Passive Transport No energy needed! (It just happens)

31. http://www.indiana.edu/~phys215/lecture /lecnotes/lecgraphics/diffusion2.gif http://www.indiana.edu/~phys215/lecture /lecnotes/lecgraphics/diffusion2.gif Explain what happened

32. Passive Transport Diffusion – net movement of particles from high concentration to low concentration Facilitated diffusion – membrane proteins create a pathway for diffusion

33. Osmosis Osmosis – diffusion of water across a membrane A cell is in a solution Two different solutions, one inside the cell, one outside the cell Osmosis determined by relative concentrations of the two

34. Solutions Hypertonic Solution that contains a higher concentration of solute

35. Hypotonic Solution with a lower concentration of solute

36. Isotonic Solutions with the same concentration of solute

37. What happens if… An animal cell is placed in a hypertonic environment? An animal cell is placed in a hypotonic environment? An animal cell is placed in an isotonic environment?

39. What happens if… A plant cell is placed in a hypertonic environment? A plant cell is placed in an isotonic environment? A plant cell is placed in a hypotonic environment?

40. Back to the eggies For each of your solutions, state whether you believe it is hypertonic, hypotonic, or isotonic to your egg. In C-E-R form!

41. Osmosis Activity: Copy and complete the chart (full page!). SolutionDefinitionAnimal Cell (healthy or unhealthy & WHY) Plant Cell (healthy or unhealthy & WHY) Hypertonic Hypotonic Isotonic

42. Active Transport Energy (ATP) required!

43. Active Transport Active Transport – cell uses energy (ATP) to move molecules through membrane Usually in opposite direction of diffusion

44. Active Transport Transport proteins pump solute across the membrane What organelle supplies the ATP needed for AT? What chemical reaction produces ATP?

45. Transport of Large Molecules Large molecules have to be packaged in vesicles to move in and out of cells Exocytosis =out of the cell Endocytosis = into the cell Phagocytosis = “cell eating” Pinocytosis = “cell drinking” http://www.northland.cc.mn.us/biology/Biology 1111/animations/active1.swf