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Cell Transport. (1). Passive Transport/Diffusion. Passive Transport/Diffusion. The movement of particles from HIGH concentration to LOW concentration. Diffusion example. Passive Transport. Does NOT use energy. May go through cell membrane or protein “doorways” in the cell membrane. - PowerPoint PPT Presentation
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Cell Transport
Passive Transport/Diffusion
(1)
Passive Transport/Diffusion
The movement of particles from HIGH concentration to LOW concentration.
Diffusion example
Passive Transport Does NOT use energy. May go through cell
membrane or protein “doorways” in the cell membrane.
Example: Spraying Perfume
Example: Sugar in Iced Tea
Passive Transport
The molecules move from an area of high concentration to an area of low concentration
Movement does not require energy (passive transport)
The movement of larger molecules (like sugar molecules) uses a protein “doorway” to go through the membrane
Passive Transport/Osmosis: The diffusion of water
Osmosis in a Cell
Active Transport(2)
Active Transport
The movement of particles from LOW concentration to HIGH concentration.
(2)
DOES use energy. May go through proteins in the cell
membrane.
Bulk Transport-ActiveEndocytosis- the cell membrane folds into
a pouch (vesicle) that encloses the large particles
Bulk Transport-ActiveExocytosis- the release of cell
products and wastes from the cell
Tonicity (descriptive words used to compare solutions)Water will diffuse to where there is more solute. Hypotonic Solution - One solution has a lower
concentration of solute than another. Hypertonic Solution - one solution has a higher
concentration of solute than another. Isotonic Solution - both solutions have same
concentrations of solute.
Plant and Animal Cells put into various solutions