Do Now! Copy vocabulary words into your notebooks: cell membrane concentration diffusion osmosis equilibrium active transport passive transport.

Do Now!Copy vocabulary words into your notebooks:cell membrane concentrationdiffusionosmosisequilibriumactive transportpassive transport

DIFFUSION: Active and Passive Transport

AnotherI Love SciencePresentation

@ 2006-All Rights [email protected]

What is the other name for the Cell Membrane?

• Fluid Mosaic Model

Passive Transport• Does osmosis or diffusion require energy?

• No, molecules move along a concentration gradient.

Facilitated Diffusion• Facilitated Diffusion- molecules move down a concentration gradient with the aid of special proteins.

Active Transport• Requires Energy.

• ATP (form of energy made by mitochondria).

• Moves against the concentration gradient.

Endocytosis

Transporting material into a cell by the in folding of a membrane.

2 Types of Endocytosis

• Phagocytosis- Solid particles are ingested into the cell.

• Pinocytosis – liquids taken into the cell.

Exocytosis• Moves materials out of the cell

Let’s Go to the Video!

QuickTime™ and aCinepak decompressor

are needed to see this picture.

One More Time!

Summary1.What is Diffusion?2.What is Osmosis?3.What is Active Transport?

4.What is Passive Transport?

HW

Complete class handouts.