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