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Aim: How can we compare active and passive transport? Do all things get through the cell membrane? Water Molecules SELECTIVELY PERMEABLE How does a rollercoaster work? When will he need energy? Should I go against the gradient or down the gradient http://programs.northlandcollege.edu/biology/Biology1111/animations/transport1.html Types of cell transport • Active transport • Energy required • Against concentration gradient • From low to high • Passive transport • No energy required • Down the concentration gradient • From high to low Diffusion Passive Transport • Diffusion = movement of O2 & CO2 • Facilitated diffusion = alcohols & glucose (needs membrane protein) • Osmosis = movement of H2O Active Transport Phagocytosis Pinocytosis How can you tell? 3 1 2 Can you tell the difference? Would you need energy? Active vs. Passive Transport Active Transport Energy Required Direction Types Yes Passive Transport No Low to high High to low Endocytosis, exocytosis Diffusion, osmsosis,
