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CELL MEMBRANE (also called plasma membrane) <ul><li>Cell membranes are made mainly of ________________ & _________________...
LIPID TAILS ARE HYDROPHOBIC HYDROPHILIC      HYDROPHOBIC    Image by Riedell
Oil and water don’t mix! Image from: http://employees.csbsju.edu/hjakubowski/classes/ch112/lipids/micbilayer.gif
PHOSPHOLIPID  BILAYER Image from: http://employees.csbsju.edu/hjakubowski/classes/ch112/lipids/micbilayer.gif
CELL MEMBRANE Proteins that stick on the surface  = _____________ (either inside or outside of cell) Proteins that stick I...
<ul><li>Recognize “self” </li></ul>GLYCOPROTEINS GLYCOPROTEINS are PROTEINS with carbohydrates attached Image from:  http:...
WHAT DOES IT DO? <ul><li>Acts as a boundary </li></ul><ul><li>Controls what enters and leaves cell </li></ul>Images  from:...
Cell membranes MOVE! <ul><li>Molecules in cell membranes are  </li></ul><ul><li>constantly moving and changing </li></ul>C...
CELL MEMBRANE (PLASMA MEMBRANE) Made mainly of  ____________________ and _________________ HYDROPHOBIC “tails” of phosphol...
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Unit 3 pp #8

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Transcript of "Unit 3 pp #8"

  1. 1. CELL MEMBRANE (also called plasma membrane) <ul><li>Cell membranes are made mainly of ________________ & __________________ </li></ul>PHOSPHOLIPIDS PROTEINS Image from: © Pearson Education Inc, Publishing as Pearson Prentice Hall; All rights reserved Outside of cell Inside of cell (cytoplasm) Cell membrane Proteins Protein channel Lipid bilayer Carbohydrate chains
  2. 2. LIPID TAILS ARE HYDROPHOBIC HYDROPHILIC  HYDROPHOBIC  Image by Riedell
  3. 3. Oil and water don’t mix! Image from: http://employees.csbsju.edu/hjakubowski/classes/ch112/lipids/micbilayer.gif
  4. 4. PHOSPHOLIPID BILAYER Image from: http://employees.csbsju.edu/hjakubowski/classes/ch112/lipids/micbilayer.gif
  5. 5. CELL MEMBRANE Proteins that stick on the surface = _____________ (either inside or outside of cell) Proteins that stick INTO membrane = ________________ (can go part way in or all the way through) PERIPHERAL INTEGRAL
  6. 6. <ul><li>Recognize “self” </li></ul>GLYCOPROTEINS GLYCOPROTEINS are PROTEINS with carbohydrates attached Image from: http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20101/Bio%20101%20Lectures/Membranes/membrane.htm
  7. 7. WHAT DOES IT DO? <ul><li>Acts as a boundary </li></ul><ul><li>Controls what enters and leaves cell </li></ul>Images from: http://vilenski.org/science/safari/cellstructure/cellmembrane.html http://www.mccc.edu/~chorba/celldiagram.htm
  8. 8. Cell membranes MOVE! <ul><li>Molecules in cell membranes are </li></ul><ul><li>constantly moving and changing </li></ul>Click to See Fluidity Animation from: http://www.sp.uconn.edu/~terry/images/anim/fluidmem.gif
  9. 9. CELL MEMBRANE (PLASMA MEMBRANE) Made mainly of ____________________ and _________________ HYDROPHOBIC “tails” of phospholipids make molecules line up as LIPID ________________ with POLAR heads facing _______ & NON-POLAR tails facing ________ Proteins attached to surface (inside or outside)= _____________ Proteins stuck into membrane = ______________ (can go part way in or all the way through) <ul><li>OTHER MOLECULES: </li></ul><ul><ul><ul><li>GLYCOPROTEINS </li></ul></ul></ul><ul><ul><ul><li>(proteins with ___________attached) </li></ul></ul></ul><ul><ul><ul><li>STEROIDS (lipids) </li></ul></ul></ul>Membranes are ____________________________________ (=Semi-permeable) Allow certain molecules to pass through; but keep others out __________________ = gel-like material + organelles between nucleus and cell membrane “ recognize self” phospholipids proteins BILAYER out in Peripheral Integral sugars SELECTIVELY PERMEABLE cytoplasm
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