1 / 14

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/

ursa
Télécharger la présentation

Catalyst

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related