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Biology 137

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Allows materials in/out of the cell. Acts as a boundary ... fearing. water. love. Orientation of Bilayer. H2O. inside. H2O. outside. So. Which is correct? ... – PowerPoint PPT presentation

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Title: Biology 137


1
The Cell Membrane
The Cell Membrane
  • Biology 137
  • Ms. Stanton

2
Levels of Organization
  • Organism living thing
  • Organ System
  • Organ
  • Tissue
  • Cell basic unit of life

3
Function of the Cell Membrane
  • Protects cell
  • Allows materials in/out of the cell
  • Acts as a boundary between cell and its
    environment

4
(Cell Membrane) Made up ofThe Phospholipid
Bilayer
Phosphate
TWO
FAT
5
One Phospholipid
Lipid Tails Hydrophobic
Phosphate Head - Hydrophilic
water
fearing
water
love
6
Orientation of Bilayer
H2O outside
H2O inside
So.. Which is correct?
YES!!!!!!
2
3
1
7
Phospholipid Bilayer
Lets take another look at it..
8
Phospholipid Bilayer
picture the bilayer going around the entire cell
9
Transport Protein and Other Components
  • Channel Protein
  • spans entire width of bilayer
  • Function allows certain materials in/out

10
Channel Proteinin action
11
Marker Protein
  • Identification
  • Carbohydrate Chain off Protein
  • (Blood Typing)

12
Receptor Protein
  • Receives information

13
Cholesterol
  • Function stability
  • prevents lipid tails from
    sticking
  • together

14
Fluid Mosaic Model
  • Flexible Membrane
  • Phospholipids move around always changing

15
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