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

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

Catalyst Did you take advantage of your 3-day break?

If so, how? If not, why not? What would you have done?

Page 2: 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:

ProtonsElectronsNeutrons

Atoms Molecules Monomers Macromolecules/Polymers

Cells Organisms

Chemistry Biology

Found in

Page 3: 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

Zoom-In

Cell

Page 4: 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 MembraneExtracellular Fluid (Outside Cell)

Cytoplasm (Inside Cell)

Cholesterol

Protein

Phospholipid Bilayer

Lipid

Hydrophilic

Hydrophobic

Carbohydrate

Page 5: 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 Fluid Mosaic Model

Phospholipids: Structure, liquid-y Proteins: Transport across membrane Carbohydrates: Signaling Cholesterols: Stability

“Moving”“Many parts”

Macromolecules!(no nucleic acids)

Page 6: 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 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”

PhospholipidHydrophobic ( water)

Hydrophilic ( water)

2 layers (“bi” layer)

Page 7: Catalyst Did you take advantage of your 3-day break? If so, how? If not, why not? What would you have done?

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:

Cell Parts: Plasma/Cell Membrane

Concentration =SoluteSolvent

=6 g sugar2 L water

**Symbol for Concentration: [ ]

[sugar] = 3 g/L

Solvent Solute

Page 8: 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 Concentration & semi-permeability are

important to the plasma membrane!! Number One: Diffusion

Diagram Source: http://arditobook.pbworks.com/w/page/11348839/Diffusion

Equal [ ]

Small Molecule

**If small molecule is water = OSMOSIS!

Type of Diffusion

Page 9: 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 Concentration & semi-permeability are

important to the plasma membrane!! (cont.) Number Two: Facilitated Diffusion

Diagram Source: http://spmbiology403.blogspot.com/2008/08/passive-transport-facilitated-diffusion.html

Step 1 Step 2 Step 3

Channel Protein Carrier Protein

High [ ]

Low [ ]

LargerMolecules

Page 10: 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 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

High [K+]

Low [K+]

High[Na+]

Low [Na+]

Diagram Source: http://cosbiology.pbworks.com/w/page/11556267/Lesson%207-02%20Nerve%20Impulse

Page 11: 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 ATP: Energy!

(Adenosine Triphosphate)

(Adenosine Diphosphate)

(Phosphate)

Image Source (ATP): http://www.uic.edu/classes/bios/bios100/lectf03am/ATP02a.jpgImage Source (Reaction): http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20101/bio%20101%20lectures/energy/metabo13.gif

ATP Structure

ATP Reaction

Page 12: Catalyst Did you take advantage of your 3-day break? If so, how? If not, why not? What would you have done?

Cell Part: Plasma/Cell Membrane Gradient: High [ ] to Low [ ]

Passive Transport: Goes w/ gradient, requires NO energy

Active Transport: Goes against gradient, REQUIRES energy Membrane

Transport

Passive Transport

Diffusion Facilitated Diffusion

Channel Proteins

Carrier Proteins

Active Transport

Cell Membrane

Pump? ?

Page 13: Catalyst Did you take advantage of your 3-day break? If so, how? If not, why not? What would you have done?

Cell Part: Plasma/Cell Membrane Osmosis: Diffusion of water across a semi-

permeable membrane

Image Source: http://course1.winona.edu/sberg/ILLUST/fig8-10.GIF

BeforeAfter

[C6H12O6] lower“Hypotonic”

[C6H12O6] higher“Hypotonic”

[C6H12O6] equal“Isotonic”

More water

Less waterZoom In

Page 14: 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 MembraneCells in isotonic Solution

Cells in hypertonic solution

Cells in hypotonic solution

Normal Shape

Shriveled Shape

Inflated Shape

Image Source: http://mywellnesswarehouse.com/Images/Interior/Isotonic/HypertonicIsotonicHypto.gif


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