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Day 13, Molecule Movement and Cells (Slide 1, Passive Transport (-No…
Day 13, Molecule Movement and Cells
Slide 1, Passive Transport
-No energy required
-Move due to gradient
differences in concentration, pressure, charge
-Move to equalize gradient
High moves toward low
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Slide 6, Facilitated Diffusion
-Channel Proteins help things enter or leave the cell
-Channels usually are transport proteins
(aquaporins facilitate the movement of water)
-No energy is used
Slide 8, Active Transport
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Slide 2, Types of Passive Transport
- Diffusion
- Osmosis
- Facilitated diffusion
Slide 4, Osmosis
-Special form of diffusion
-Fluid flows from lower solute concentration to higher solute
-Often involves movement of water
Into cell
Out of cell
Slide 5, Solution Differences & Cells
Solvent (ex: water) + solute (ex: salt) = solution
Hypotonic
Solutes in cell more than outside
Outside solvent will flow into cell
Isotonic
Solutes equal inside & out of cell
Hypertonic
Solutes greater outside cell
Fluid will flow out of cell
Slide 7, Process of Facilitated Transport
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Slide 9, Endocytosis
Movement of large material
-Particles
-Organisms
-Large molecules
Movement is into cells
Types of endocytosis
bulk-phase (nonspecific)
Protein receptor-mediated (specific)
Slide 10, Process of Endocytosis
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Slide 12, Process of Exocytosis
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