3 5 Active Transport Endocytosis and Exocytosis KEY

3. 5 Active Transport, Endocytosis, and Exocytosis KEY CONCEPT Cells use energy to transport materials that cannot diffuse across a membrane.

3. 5 Active Transport, Endocytosis, and Exocytosis Active transport requires energy input from a cell and enables a cell to move a substance against its concentration gradient (from lower to higher concentrations). • Active transport is powered by chemical energy (ATP). • Active transport occurs through transport protein pumps. • Cells use active transport to maintain homeostasis.

Sodium-Potassium Pump • http: //highered. mheducation. com/sites/0072 495855/student_view 0/chapter 2/animation_ _how_the_sodium_potassium_pump_works. html •

3. 5 Active Transport, Endocytosis, and Exocytosis A cell can import and export large materials or large amounts of material in vesicles during the processes of endocytosis and exocytosis. • Cells use energy to transport material in vesicles. • Endocytosis is the process of taking material into the cell. • Phagocytosis is a type of endocytosis. It takes in solids. • Pinocytosis takes in liquids.

3. 5 Active Transport, Endocytosis, and Exocytosis A cell can import and export large materials or large amounts of material in vesicles during the processes of endocytosis and exocytosis. • Cells use energy to transport material in vesicles. • Exocytosis is the process of expelling material from the cell. • https: //www. youtube. com/wat ch? v=Du. Dmvlbpj. HQ

• • Review: Study vocabulary Know your famous scientists p. 67 Know the 3 parts to the cell theory p. 67 Difference between prokaryotic and eukaryotic cells Label a plant or animal cell p. 70 Know what the organelles do

Label a cell membrane p. 78 • Know the difference between these passive transport processes: • Diffusion • Osmosis • Facilitated diffusion • • Know the difference between these active transport processes: Protein pumps • Endocytosis (phagocytosis and pinocytosis) • Exocytosis •