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3.5 Active Transport, Endocytosis, and Exocytosis

Learn about active transport, endocytosis, and exocytosis - processes that utilize energy to move materials across cell membranes. Explore how cells maintain homeostasis and import/export large substances in vesicles. Discover the sodium-potassium pump and different types of endocytosis and exocytosis.

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3.5 Active Transport, Endocytosis, and Exocytosis

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  1. 3.5 Active Transport, Endocytosis, and Exocytosis KEY CONCEPT Cells use energy to transport materials that cannot diffuse across a membrane.

  2. 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.

  3. Sodium-Potassium Pump • http://highered.mheducation.com/sites/0072495855/student_view0/chapter2/animation__how_the_sodium_potassium_pump_works.html

  4. 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.

  5. 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/watch?v=DuDmvlbpjHQ

  6. 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

  7. 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

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