1. Guided Reading questions Pages 90-96

2.  With table partner check over your Cell S & F worksheet  Fill in any blanks  Return to your lab group’s cell poster  Is your scenario clear?  Poster Walk complete?  You will be assigned another scenario … Use large white board to illustrate what would happen in your cell?

3.  Give an example of each  What are the advantages of each?

4.  P 96 #1-2 - we will correct #1 together  #2 - You may answer this alone or in pairs using a white board

5. Prokaryotic Eukaryotic  Early cell  Analogy– Studio apartment: limited space or compartments for cellular functions  Example: ____________  Missing structure: Plasma Membrane organelles especially the NUCLEUS  Later developed cell  Analogy – Mansion: Many rooms or compartments for cellular functions  Example: ____________  Structures common with Prokaryotic Cell: [p.96#1] ◦ ________________

6.  Cellular Respiration occurs in all cells  Use your white board to explain how it occurs in one type of cell! [May work in pairs or alone] ◦ Be sure to include:  Type of Cell?  What organelles are involved?  Where and what happens? ◦ What is the main difference between Prokaryotic vs. Eukaryotic Cells?

7.  Division of labor (less work for each part)  Complex processes are able to occur  In a multicellular organism, the organelles may have a different distribution of structures to get the job done ◦ Example muscle cell vs. a skin cell in humans  Metabolic processes such as Photosynthesis and Cellular Respiration occur in special compartments such as

8.  Processes such as Cellular Respiration takes a longer amount of time & more molecules needed to complete the process  Reproduction of Chromosomes more complex and take longer  Cell Division is more complex & time consuming  More structures to produce and maintain

10.  What are some metabolic processes that occur in Plant Cell, Animal Cell, Bacteria Cell?  Where do these processes occur in eukaryotes?  In prokaryotes?  Let’s go through a process together…

11.  Name the process  What biomolecules are needed for this process  What organelles are used in process  Note the order of the organelles being used  Note what each organelle does in this process  Don’t forget about what happens to the product

12.  What happens in each example ◦ Tea bag in warm – What happens? ◦ Perfume (gas in gas) ◦ Food coloring (liquid in liquid) ◦ Potassium Permanganate (solid in liquid)  Diffusion is the movement of molecules from an area of __________ concentration to an area _________concentration of a substance until equilibrium has been reached. [Down the Concentration Gradient]

13.  What is the organelle that serves as a boundary?  What role must the boundary organelle play?  How does the cell both protect itself from hazards in its environment and allow resources from the environment into the cell in order to carry out its life sustaining functions?

14.  Each pair of students (model partner) will answer assigned questions together [a-i]  Be sure you have answered your assigned question(s) on your worksheet  Be prepared to report your question(s)’ answers to the full class - Please the white board (front of class) or doc camera for any drawings necessary  You have limited time, so work quickly!  All will be responsible for all answers.

15. Build-the-Membrane …model  Get your model to use as we go through the information on the membrane’s function! integral protein  How many proteins on your model are known as an integral protein? _____ Name & list!  Which protein was a peripheral protein? (did not go through the lipid layer of membrane)  Proteins that transmit signals across a membrane are called________________  Transporter Channel Proteins  Transporter & Channel Proteins form pores that open & close to allow specific molecules through the membrane.

17.  1/21 (Thursday)  Inquiry activity  Lab activity with starch and baggie  What represented the following? ◦ Cell Membrane ____________ ◦ Cytoplasm and large molecules in cell __________ ◦ External environment – molecules ____________  You should have the color of the solution in the bag and the beaker recorded  You should also have a prediction recorded  Note before pulling beaker out of drawer

18.  Observe your lab group’s set up  Record: ◦ Color of Baggie solution  Note without disturbing the bag in beaker  Then slowly remove bag from beaker  Record color and not any other changes in baggie’s solution ◦ Color of solution in the beaker  Note any additional changes to the beaker solution  Clean up ◦ Baggie may be placed in garbage ◦ Beaker rinsed out with water; dried

19.  Answer all analysis questions on worksheet  Discuss with your lab group ◦ Was there a change? ◦ What moved through the baggie? ◦ How do you know? ◦ Was this an example of selective permeability?

20.  Separates the internal metabolic action from the disordered and sometimes harsh external environment while permitting certain substances in selectively  Called “ Selectively Permeability”

21.  Take in resources it needs for metabolic processes such as ____________________  Be able to rid itself of wastes such as _________________________  Be able to keep harmful substances out of the cell such as ________________________

22.  Movement of molecules from an area of high concentration to an area of low concentration.  Note DEMO 2 ---- ◦ Perfume… (gas in gas) ◦ Beaker with dye drops (liquid in a liquid) ◦ Beaker with powder dye (solid in a liquid) ◦ Teabag in water  Hot water  Cold water  What about through a cell membrane? ◦ Which demo models a membrane? ◦ What models it in the labs you’ve done?

23. Molecules of dye Membrane (cross section) WATER (a) Diffusion of one solute Net diffusion Equilibrium

24.  Let’s correct the worksheet  You are responsible for knowing the make up of the cell membrane!  Note the following slides and coloring you completed…

25. Hydrophilic head Hydrophobic tail WATER

26. Do you have a drawing of this molecule? Note the Hydrophilic and hydrophobic portions…

27. Phospholipid bilayer Hydrophobic regions of protein Hydrophilic regions of protein Hydrophobic vs. Hydrophilic

28.  What biomolecules compose the cell membrane?  What properties are important for this boundary to have? Why?  How do think substances move in and out of the cell across this boundary?

30.  How do lipid-soluble molecules move through the membrane?  What moves through membrane without use of Protein?  What happens to the passage of gases? ◦ Oxygen ◦ Carbon Dioxide  How does water move through the membrane?  Which substances need a protein to move cross the membrane?

32.  No energy from the cell is needed for movement of materials through membrane [Movement with the concentration gradient]  Diffusion  Diffusion : Movement of molecules from a high concentration to a low concentration.  Facilitated Diffusion:  Facilitated Diffusion: Diffusion of LARGE molecules using Channel Protein  Osmosis  Osmosis : Diffusion of water through a semi-permeable membrane ◦ NOTE THESE DEFINITIONS

36. Example of this would be?

37. More wateroutside Water same in & out More water inside

39.  When does a cell use Facilitated Diffusion? ◦ Examples: ____________________________________  What must be present in the membrane for it to occur? _____________ __________  Do the molecules still move from a HIGH concentration to a LOW concentration? _____

40. Energy  Uses cell Energy to move particles through the membrane  Moving particles from a low concentration to a high concentration…. Going against the physical law of diffusion. [or concentration gradient]  Membrane proteins are used in active transport ◦ NOTE THIS INFORMATION

42. Active transport ATP

46. Passive transportActive transport DiffusionFacilitated diffusion ATP OSMOSIS – movement of water NO ENERGY NEEDED

48. Answer the following in Notebook:  Did the Cell Membrane illustrate Passive Transport, Active Transport OR Both?  Which molecules moved through the plastic ziploc bag?  How do you know?  List the molecules used in this activity from the smallest to the largest?  Complete any other questions not answered in notebook

49.  Let’s look at more cells ◦ Plant Cell (Elodea – water plant)  Add %15 Salt (NaCl) solution  View what happens to the plant cell ◦ Protists (unicellular organism – Amoeba) – prepared slide ◦ Bacteria (prokaryotic cell) – prepared slide ◦ Revisit Cheek cells  Add %15 Salt (NaCl) solution  What happens to the cheek cells

51.  What occurs when iodine is added to a starch solution? ________________________  In lab groups, set up the simulation…  Make a prediction as to what you think will move through the bag (cell membrane model)  Label cup… final reading will occur on ______?