1. WARM UP: Tues, Oct 1 In your 3 brad folder: Define homeostasis in your own words. (Hint: look in cell theory notes)

2. Cellular Processes Day 1

3. Objectives 1. Define homeostasis. 2. Describe the Fluid Mosaic Model. 3. List items that enter & exit the cell.

4. Homeostasis = ability to maintain internal equilibrium – Maintain = keep – Internal = inside – Equilibrium = stable or balanced

5. Why is maintaining homeostasis in our body & cells important? An imbalance = disease or death!

6. Cell Membrane Function: 1) Regulates what enters & exits cell 2) Provides protection & support

7. Cell Membrane AKAs AKA: Plasma Membrane AKA: Phospholipid Bilayer AKA: Fluid Mosaic Model

8. Fluid Mosaic Model Fluid = not solid, membrane moves Mosaic = made of many parts

9. Parts of a Plasma Membrane Different Macromolecules in membrane: 1) Lipids = create bi-layer 2) Protein = create channel to pass large items 3) Carbohydrate Chains = identifying markers

10. A Closer Look at the Cell Membrane Phosphate head Fatty Tails Lipid Bi-Layer = 2 layers

11. Phospholipid Bilayer Latin Root: Bi = 2 Phospholipid = hydrophilic head + hydrophobic tail  BILAYER Hydrophilic = water loving Hydrophobic = water fearing Water & Oil do not mix

12. What Enters? What the cell needs for survival 1)Nutrients 2) 3) 4)

13. What Exits? What the cell needs to remove for survival (wastes) 1)Carbon Dioxide 2) 3) 4)

14. Membranes 1) Permeable = anything can cross 2) Impermeable = nothing can cross 3) Selectively Permeable = some substances can cross, but not others ***Most membranes are selective***

15. Phospholipid Bilayer and maintaining homeostasis Keep Balance = membrane selectively permeable NO ENTRY ENTER

16. Egg Lab: Day 1 Paste chart into notebook

17. WARM UP: Wed, Oct 2 In your 3 brad folder: What is the difference between a permeable and impermeable membrane?

18. Cellular Processes Day 2

19. Objectives 1. Define diffusion & osmosis. 2. Explain the 3 types of osmosis. 3. Define osmotic pressure. 4. Predict the results of an osmotic lab experiment.

20. How “things” get selected to come into and out of the cell… DIFFUSION OSMOSIS ACTIVE TRANSPORT

21. DIFFUSION = movement of particles from high to low - Goes w/ the crowd - w/ the concentration gradient Does NOT require energy Diffusion stops when 2 areas are EQUAL (homeostasis) LowHigh

22. Facilitated Diffusion = movement larger molecules w/ “help” from protein channels Does NOT require energy

23. OSMOSIS = diffusion (movement) of water - From high to low - W/ the crowd - Does NOT require energy

24. Solvent & Solute Solvent = the liquid portion –i.e. the water in a salt water mixture Solute = the part that is mixed in –i.e. the salt in a salt water mixture

25. 3 Types of Osmosis 1)Hypertonic Solution = > (greater) concentration of solute outside the cell than inside - Cell Shrink Latin root: Hyper = over, more, higher

26. 3 Types of Osmosis 2) Hypotonic Solution = < (lower) concentration of solute outside the cell than inside - Cell Burst Latin root: Hypo = under, less, lower

27. 3 Types of Osmosis 3) Isotonic Solution = concentration solute outside = concentration inside - Cell stays the same

28. Osmotic Pressure = pressure exerted on a cell membrane due to concentration gradient = different conc. on either side of the cell membrane

29. Egg Lab: Day 2 Answer questions 1-2 in complete sentence Hypothesis Day 2: “ I believe…” - Will the syrup level go up or down? - Will the egg get larger or smaller?

30. WARM UP: Thurs, Oct 3 In your 3 brad folder: What is the difference between a hypertonic solution & a hypotonic solution?

31. Cellular Processes Day 3

32. Objectives 1.Define active transport. 2.List the types of active transport. 3.Define concentration. 4. Predict the results of an osmotic lab experiment.

33. Active Transport = movement of molecules against the concentration gradient ***Low to High*** –Against the crowd –REQUIRES energy –ATP = energy in cell ATP Requires Energy

34. Endosytosis = take materials into cell Latin root: endo = inner

35. Endosytosis Type 1: Phagosytosis = engulf and ingest particles = “cell eating” -EX: white blood cells eating invading bacteria cells

36. Type 2: Pinocytosis = ingest extracellular fluid & its contents = “cell drinking” –EX: human egg cells drinking nutrients from surrounding cells while maturing in ovary Endosytosis

37. Exosytosis = cell releases materials to the outside - discharge as membrane-bounded vesicles - pass through the cell membrane = “out of the cell” Latin root: Ex = outer, away from

38. Solution & Concentration Solution = mixture 2+ substances Concentration = amount of substance (solute) in liquid (solvent) –Cytoplasm = one concentration –Outside of cell = another concentration *** Want balance (homeostasis)***

39. Concentration Concentration gradient = unequal distribution on either side of a membrane Equilibrium = concentration same n both sides of cell

40. Egg Lab: Day 3 Answer questions 3-7 in complete sentences Hypothesis Day 3: “I believe…” -Will the water level go up or down? -Will the egg get larger or smaller?

41. WARM UP: Fri, Oct 4 In your 3 brad folder: Define the term equilibrium

42. Egg Lab: Day 4 - Answer questions 8-12 in complete sentences

43. Friday, Oct 4 Periods 1, 2, & 5 = Cell Process worksheets

44. WARM UP: Mon, Oct 7 In your 3 brad folder: What are the 3 macromolecules found in the plasma membrane?

45. Cellular Processes Day 4

46. Objectives 1. Describe the difference between positive (+) and negative (-) feedback. 2. Predict the results of an osmotic lab experiment.

47. Feedback Mechanism = loop system in which system responds in either: 1) same direction (positive feedback) 2) opposite direction (negative feedback)

48. Feedback Mechanism

49. Feedback Mechanisms Channels = allows larger particles to come in. (Gate/Door) Receptors = signal (Intercom) Markers = identify the type of cell (ID Badge)

50. Positive Feedback = results in amplification or growth of output signal Ex: If you eat a McDouble at McDonalds, a hormone is released to your brain to signal satiation. You will feel the same “happiness” each time you eat the hamburger.

51. Negative Feedback = results in system responding in the opposite direction EX: Regulation of blood glucose levels. –Blood glucose levels continue to rise –May result in diabetes EX: Sweating

52. Avid Thinking Strategy Map News! Title of News Article or Topic How does this Affect me? Name of Source Date Science Fact Conclusion Clues Evidence New Vocabulary Branch of Science

53. WARM UP: Tues, Oct 8 In your 3 brad folder:

54. Tues, Oct 8 Latin Roots Quiz & Osmosis/Diffusion Worksheets

55. Latin Roots Quiz 1.Bi = ______6. Macro = _____ 2.Mono = _____7. Endo = ______ 3.Bio = ______8. Hypo = ______ 4.Poly = ______9. Hyper = _____ 5.Di = ________10. Ex = _______ Bonus: Cyto = ______

56. WARM UP: Wed, Oct 9 In your 3 brad folder:

57. Wed, Oct 9 Stations Review

58. WARM UP: Thurs, Oct 10 In your 3 brad folder:

59. Thurs, Oct 10 Gems of Wisdom

60. WARM UP: Fri, Oct 11 In your 3 brad folder:

61. Fri, Oct 11 Test