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Moving Cellular MaterialsSOL BIO 4.d
Fluid Mosaic Model:A mosaic is a structure made up of many different parts.
The plasma membrane of a cell is composed of different kinds of macromolecules.
Phospholipid
bilayer
Passive Transport:
• PASSIVE TRANSPORT- DOES NOT require energy to move materials through the cell
membrane
3 Types of Passive Transport:
DIFFUSION- molecules of a substance will move from an area of high concentration to an area of low concentration until they reach equilibrium
• Diffusion occurs in cells when substances (O2,CO2, salts,
sugars, amino acids) that are dissolved in H2O move from an area of higher concentration to an area of lower concentration.
3 Types of Passive Transport:
3 Types of Passive Transport:
3 Types of Passive Transport:
DIFFUSION
3 Types of Passive Transport:
2. OSMOSIS (diffusion of water)-the movement of water
molecules through a semi-permeable membrane from an
area of greater water concentration or pressure to
an area of lesser water concentration or pressure
3 Types of Passive Transport:
OSMOSIS
3 Types of Passive Transport:
• Hypertonic- too much solute, not enough water; cell will shrink & wrinkle
• Hypotonic- too much water, not enough solute; cell will swell up, expand
• Isotonic- equal parts water and solute; water moves in & out of the cell in dynamic equilibrium
3 Types of Passive Transport:
OSMOSIS
3 Types of Passive Transport:
OSMOSIS
3 Types of Passive Transport:
3. FACILITATED TRANSPORT- requires transport proteins in the cell membrane to move
materials into and out of the cell
3 Types of Passive Transport:
FACILITATED TRANSPORT
Active Transport:
• ACTIVE TRANSPORT- requires ENERGY to move materials through the cell membrane
Active Transport:
2 Types of Active Transport:
• ENDOCYTOSIS- requires ENERGY to move materials INTO the cell membrane
• EXOCYTOSIS- requires ENERGY to move materials OUT OF the cell membrane
Active Transport:
Active Transport:
Active Transport:
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