Cell Size and Surface Area
aligned to Ngss Hs-ls1-2, 2.2 Cell Size
Learning Objective
I can explain how surface area to volume ratio affects cell size and function.
Lesson Flow
Watch Video
Surface area to volume ratio of cells | Cell structure and function | AP Biology | Khan Academy
Khan Academy
Guided Notes
Key concepts students will learn:
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Cells need resources from the outside world, which must make their way through the outer membrane, and waste products need to be released across that membrane.
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As the volume of a cell increases, the ratio between surface area to volume decreases, making it harder to exchange resources, waste, and energy.
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Cells can increase their surface area to volume ratio through folds in their membranes, allowing for more efficient exchange.
Practice
10 questions • Multiple choice & Short answer
Exit Ticket
“Explain how a cell's surface area to volume ratio affects its ability to exchange resources and waste with its environment. Be sure to include what happens to the ratio as a cell grows larger.”
Teacher Guide
Get the complete package:
- Answer keys for all questions
- Differentiation strategies
- Extension activities
- Printable student handouts
