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Catalyst

Catalyst. Did you take advantage of your 3-day break? If so, how? If not, why not? What would you have done?. Cell Parts: Plasma/Cell Membrane. All cells (pro & eu ) have a plasma/cell membrane! Recall:. Found in. Protons Electrons Neutrons. Atoms. Molecules. Monomers. Macromolecules/

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Catalyst

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  1. Catalyst • Did you take advantage of your 3-day break? If so, how? If not, why not? What would you have done?

  2. Cell Parts: Plasma/Cell Membrane • All cells (pro & eu) have a plasma/cell membrane! • Recall: Found in Protons Electrons Neutrons Atoms Molecules Monomers Macromolecules/ Polymers Cells Organisms Chemistry Biology

  3. Cell Parts: Plasma/Cell Membrane Cell Zoom-In

  4. Cell Parts: Plasma/Cell Membrane Extracellular Fluid (Outside Cell) Lipid Carbohydrate Hydrophilic Phospholipid Bilayer Hydrophobic Cholesterol Protein Cytoplasm (Inside Cell)

  5. Cell Parts: Plasma/Cell Membrane • Fluid Mosaic Model • Phospholipids: Structure, liquid-y • Proteins: Transport across membrane • Carbohydrates: Signaling • Cholesterols: Stability “Moving” “Many parts” Macromolecules! (no nucleic acids)

  6. Cell Parts: Plasma/Cell Membrane • Semi-permeable membrane • Allows small molecules through,but not larger molecules • Plasma membrane is semi-permeable • Regulates what can/cannot enter/exit the cell. • Phospholipid Bilayer: main portion of membrane “Partially” “Passable” “Two” Hydrophobic ( water) Phospholipid 2 layers (“bi” layer) Hydrophilic ( water)

  7. Cell Parts: Plasma/Cell Membrane • Mini-Lesson: Concentration • Amount of solute in solvent • Example: 6 grams sugar in 2 liters water • Importance? Molecules want to move from high [ ] to low [ ] • Imagine: Solvent Solute 6 g sugar Concentration = Solute = 2 L water Solvent **Symbol for Concentration: [ ] [sugar] = 3 g/L                             

  8. Cell Parts: Plasma/Cell Membrane • Concentration & semi-permeability are important to the plasma membrane!! • Number One: Diffusion Small Molecule **If small molecule is water = OSMOSIS! Type of Diffusion Equal [ ] Diagram Source: http://arditobook.pbworks.com/w/page/11348839/Diffusion

  9. Cell Parts: Plasma/Cell Membrane • Concentration & semi-permeability are important to the plasma membrane!! (cont.) • Number Two: Facilitated Diffusion High [ ] LargerMolecules Step 1 Step 2 Step 3 Low [ ] Channel Protein Carrier Protein Diagram Source: http://spmbiology403.blogspot.com/2008/08/passive-transport-facilitated-diffusion.html

  10. Cell Parts: Plasma/Cell Membrane • Diffusion vs. Facilitated Diffusion • Diffusion through phospholipid bilayer • Facilitated diffusion through protein (channel OR carrier) • Both go from HIGH [ ] to LOW [ ] • Concentration & semi-permeability are important to the plasma membrane!! (cont. x2) • Number Three: Cell Membrane Pump Low [K+] High[Na+] High [K+] Low [Na+] Diagram Source: http://cosbiology.pbworks.com/w/page/11556267/Lesson%207-02%20Nerve%20Impulse

  11. Cell Parts: Plasma/Cell Membrane • ATP: Energy! ATP Reaction ATP Structure (Phosphate) (Adenosine Triphosphate) (Adenosine Diphosphate) Image Source (ATP): http://www.uic.edu/classes/bios/bios100/lectf03am/ATP02a.jpg Image Source (Reaction): http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20101/bio%20101%20lectures/energy/metabo13.gif

  12. Cell Part: Plasma/Cell Membrane • Gradient: High [ ] to Low [ ] • Passive Transport: Goes w/ gradient, requires NO energy • Active Transport: Goes against gradient, REQUIRES energy

  13. Cell Part: Plasma/Cell Membrane • Osmosis: Diffusion of water across a semi-permeable membrane [C6H12O6] lower “Hypotonic” [C6H12O6] higher “Hypotonic” [C6H12O6] equal “Isotonic” More water Less water Zoom In After Before Image Source: http://course1.winona.edu/sberg/ILLUST/fig8-10.GIF

  14. Cell Parts: Plasma/Cell Membrane Cells in isotonic Solution Cells in hypertonic solution Cells in hypotonic solution Normal Shape Inflated Shape Shriveled Shape Image Source: http://mywellnesswarehouse.com/Images/Interior/Isotonic/HypertonicIsotonicHypto.gif

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