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Name:__________________________Hour:123456 Cell Membrane and Transport:Identify the boundary of all cells Draw and describe the lipid bi-layer structure of the cell membrane Identify the macromolecules that compose the cell membrane Describe functions of the cell membrane Explain, compare and contrast and provide examples of diffusion, osmosis and active transport Describe how cells function in a narrow range of conditions (homeostasis) Web ResourcesUsing google, search:Amoeba sisters: Homeostasis and the Cell Membrane KingMr. W Cell Membrane RapInsights into cell membranes via dish detergentTextbook ResourcesSection 7.3 (p208-213), 7.4 (p214-219)Amoeba Sister Video Recap of Homeostasis and the Cell MembraneDefine homeostasis in your own words.The video clip places a lot of emphasis on the importance of the cell membrane in maintaining homeostasis in cells. Based on how you defined the word homeostasis, why is the cell membrane so important for maintaining homeostasis?TEDEd Video: Insights into cell membranes via dish detergent- Ethan PerlsteinBefore the invention of the electron microscope (and thus the ability to directly observe a cell membrane), when and how did scientists determine that the cell membrane was a double layer of lipids?The Structure of MembranesKey Idea: Cell membranes are composed of a lipid bilayer with proteins moving freely within it. Color the cell membrane parts the following colors:Fats/Lipids:Hydrophobic parts: GreenHydrophilic parts: BlueCarbohydrates: RedProteins: YellowThe now-accepted fluid-mosaic model of membrane structure describes a phospholipid bilayer with proteins of different types moving freely within it. The double layer of lipids is quite fluid. It is a dynamic structure (constantly in motion) and is actively involved in cellular activities. Answer the following questions about the cell membrane.Identify in order of greatest composition the macromolecules that compose a cell membrane.Where (inside or outside) of a cell are the carbohydrates found?What function do the carbohydrates have?What function do the proteins have in a cell membrane?Name two functions of the cell membrane.What is meant by the phrase “The cell membrane is a lipid bi-layer semipermeable structure?”34290014980700309562585725Using your knowledge of the composition of the cell membrane, explain the cartoon. 4000020000Using your knowledge of the composition of the cell membrane, explain the cartoon. Movement of Materials In and Out of CellsPassive TransportDiffusionMolecules are always ___________________.The random movement of molecules from where there are lots of them (___________________) to where there are fewer of them (_________________) is called _____________________Examples:Drawing:OsmosisA substance that gets dissolved in another is a ____________The substance that dissolves the solute is the _____________The solvent in cells is ______________Usually the solute and solvent particles move from ___________ to __________ concentration (diffusion)Cell membranes are _____________________________ - they allow some things to pass through but not others.If a solute cannot pass through the membrane then ____________ will move to the side there is more_________________ on; this is called ________________.Examples:Drawing:Active TransportSome substances like _________ and __________ _______ are more plentiful _________ the cell than _________________________ is used to transport these substances inside against their ________________ _____________ (from _____ concentration to ______ concentration).Color the hydrophobic part of the phospholipid bilayer GREEN.Color the hydrophilic part of the bilayer BLUE.Color the protein YELLOW. (This protein is known as an active transport pump- label it)Color the solute BROWN.Label the side of the membrane with high concentration of solutes “High”Label the side of the membrane with low concentration of solutes “Low” Draw a red arrow to show the movement of the molecules during active transport.What is the energy used for?Identify each example as diffusion (DI), osmosis (O) and/or active transport (AT)______ Movement of oxygen from blood into cells______ Movement of water from cells into blood stream______ Placing one drop of food coloring into a glass of water- turning the water a different color.______ Plant cells absorbing nutrients from a nutrient poor soil.______ Dry beans swelling after being placed in water______ The cell membrane forms around another substance, for example, how an amoeba (unicellular eukaryote) gets its food.______ Smelling perfume across a room______ Movement of a few large molecules from one side of membrane into a side with more large molecules______ Movement of salt from where there is less to a side where there is more______ In nerve cells, ions (atoms or molecules with an electric charge) are pumped into the cell from a lower to higher concentration.______ Only water is involved in this type of movement.______ This movement does not use energy and is caused by the random movement of individual particles._______ Can happen in living cells._______ A substance moves and becomes more evenly spread out._______ A vacuole membrane fuses (becomes a part of) the cell and the contents are released outside of the cell.1428763048000781050180975ABCABCEach picture above is showing the different levels of solute concentration inside a cell (lower right corner) and the solution (left side of picture). If the cell in the picture is a red blood cell draw three pictures showing what would happen if the cell is placed in each solution (A,B,C)If the cell in the picture is a plant cell draw three pictures showing what would happen if the cell is placed in each solution (A,B,C)Complete this concept map on transport of materials through membranes. Use these words or phrases one or more times: simple diffusion, dynamic equilibrium, energy, higher concentration, lower concentration, osmosis, passive, facilitated diffusion. 180975092075Transport through membranesTransport through membranes454342548228250041814751718310001418590283273500142875050425350040957513804284006762751793875requires00requires15906756280785001409699387096000142875017087850041719496557010004000500593788500313372436709340053340003842385004381499259461000459104924422100029813252546986003076575622935146685061341023145752718435example00exampleright2737485example00example3314700100393529146503832860Can move materials from region of400000Can move materials from region of3486150519493536290256128385Results in00Results in5994406299835To regions of 00To regions of 660405185410Can move materials from region of00Can move materials from region of34861501718310requires00requires3600450689610Can be00Can be666750737235Can be00Can be4476756638925466725546735044767521088354600575596646033813754118610205740030803853562350308038550387253099435428625160020activeactive328612549530No energy0No energy359092557785example00example830580156845involves00involves47625020320Transport proteinsTransport proteins363855026035To regions of 00To regions of ................
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