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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.
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(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.
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 waterOsmosis in a Cell
(2) Active Transport
(2) Active Transport • The movement of particles from LOW concentration to HIGH concentration.
DOES use energy. • May go through proteins in the cell membrane.
Bulk Transport-Active • Endocytosis- the cell membrane folds into a pouch (vesicle) that encloses the large particles
Bulk Transport-Active • Exocytosis- 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.