Do Now! Copy vocabulary words into your notebooks: cell membrane concentration diffusion osmosis equilibrium active transport passive transport DIFFUSION: Active and Passive Transport Another I Love Science Presentation @ 2006-All Rights Reserved ILOVESCIENCE@mac.com 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 Diffusionmolecules 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 • PhagocytosisSolid 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 a Cinepak decompressor are needed to see this picture. One More Time! QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture. Summary 1.What is Diffusion? 2.What is Osmosis? 3.What is Active Transport? 4.What is Passive Transport? HW Complete class handouts.