1. LESSON LESSON INTRODUCTION Get Ready Before you begin, decide if you agree or disagree with each of these statements. As you view this presentation, see if you change your mind about any of the statements. 3 Moving Cellular Material What do you think?

2. Get Ready LESSON LESSON INTRODUCTION Diffusion and osmosis are the same process. Cells with large surface areas can transport more than cells with smaller surface areas. 3 Moving Cellular Material Do you agree or disagree?

3. Key Concepts/Essential Questions LESSON LESSON INTRODUCTION 3 Moving Cellular Material How do materials enter and leave cells? How does cell size affect the transport of materials?

4. Vocabulary Watch out for these words! LESSON LESSON INTRODUCTION passive transport diffusion osmosis facilitated diffusion active transport endocytosis exocytosis 3 Moving Cellular Material

5. LESSON LESSON INTRODUCTION 3 Moving Cellular Material Why the Veil? Look at the photo at the beginning of the lesson. A beekeeper often wears a helmet with a face-covering veil made of mesh. The openings in the mesh are large enough to let air through, yet small enough to keep bees out. In a similar way, some things must be allowed in or out of a cell, while other things must be kept in or out. How do the right things enter or leave a cell?

6. LESSON 3 Moving Cellular Material

7. Lesson Review LESSON LESSON WRAP-UP Do you agree or disagree? Diffusion and osmosis are the same process. 3 Moving Cellular Material Disagree. Osmosis is the transport of water, and diffusion is the movement of other substances. Do you agree or disagree?

8. Lesson Review LESSON LESSON WRAP-UP Do you agree or disagree? Cells with large surface areas can transport more than cells with smaller surface areas. 3 Moving Cellular Material Agree. To move substances into and out of a cell efficiently, the surface area of a cell must be large compared to its volume. Do you agree or disagree?

9. Key Concept/Essential Question Review LESSON LESSON WRAP-UP How do materials enter and leave cells? 3 Moving Cellular Material Materials enter and leave a cell through the cell membrane using passive transport or active transport.

10. Key Concept/Essential Question Review LESSON LESSON WRAP-UP How does cell size affect the transport of materials? 3 Moving Cellular Material The ratio of surface area to volume limits the size of a cell. In a smaller cell, the high surface-area-to-volume ratio allows materials to move easily to all parts of a cell.