moving cellular material
DESCRIPTION
3. Moving Cellular Material. What do you think?. 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. Moving Cellular Material. - PowerPoint PPT PresentationTRANSCRIPT
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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?
Get Ready
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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?
Key Concepts/Essential Questions
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LESSON INTRODUCTION3 Moving Cellular Material
• How do materials enter and leave cells?
• How does cell size affect the transport of materials?
Vocabulary
Watch out for these words!
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LESSON INTRODUCTION
• passive transport
• diffusion
• osmosis
• facilitated diffusion
• active transport
• endocytosis
• exocytosis
3 Moving Cellular Material
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LESSON INTRODUCTION3 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?
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3 Moving Cellular Material
Lesson Review
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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?
Lesson Review
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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?
Key Concept/Essential Question Review
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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.
Key Concept/Essential Question Review
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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.