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  • YEAR 7
    • Bio 1: Cells (7A)
    • Bio 2: Reproduction and Variation (7B, 7D)
    • Bio 3: Environment (7C)
    • Chem 1: Acids and Alkalis (7E)
    • Chem 2: Chemical Reactions (7F)
    • Chem 2: Solutions (7H)
    • Phys 1: Solids, Liquids and Gases (7G)
    • Phys 2: Forces (7K)
    • Phys 3: Energy (7I)
    • Phys 3: Electricity (7J)
    • The Solar System and beyond
  • YEAR 8
    • Bio 4: Nutrition (8A)
    • Bio 5: Respiration (8B)
    • Bio 6: Microbes and Disease (8C)
    • Chem 3: Elements, Mixtures, Compounds (8EF)
    • Chem 4: Chemical Reactions (8G)
    • Phys 4: Heat transfer (8I)
    • Phys 5: Magnetism (8J)
    • Phys 6: Waves (8L Sound)
    • Phys 6: Waves (8K Light)
    • Ecological Relationships (8D)
    • The Rock Cycle (8H)
  • YEAR 9
    • Bio 7: Inheritance and Selection (9A)
    • Bio 8: Health (9B)
    • Bio 9: Farming
    • Chem 5: Metals (9EF)
    • Chem 6: Pollution (9CG)
    • Phys 7: Motion (9K)
    • Phys 8: Energy and Electricity (9I)
    • Phys 9: Pressure and Moments (9L)
    • Plants for food and Photosynthesis (9CD)
    • Environmental Chemistry and Using Chemistry (9GH)
    • Gravity and Space (9J)
  • IGCSE
    • IGCSE Biology >
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IGCSE BIOLOGY 
B2 cells

Before you start you can look back at 7A Cells.

This unit builds on your previous knowledge about cell structure and specialised cells. You will then learn about how substances move in and out of cells.


If you only remember one thing:

PLANT AND ANIMAL CELLS HAVE CELL MEMBRANE, CYTOPLASM AND NUCLEUS

This is the second of the 11 Biology units:
B1. Characteristics of Living Organisms 
B2. Cells
B3. Enzymes 
B4. Nutrition

B5. Transportation
B6. Respiration
B7. Coordination and Response
B8. Reproduction
B9. Inheritance
B10. Energy Flow in Ecosystems 
B11. Human Influences on the Ecosystem

LESSON 1: CELL STRUCTURE AND MICROSCOPES

By the end of this lesson students will be able to:
  • Label diagrams of plant and animal cells
  • Name the differences between plant and animal cells
  • Use a microscope

Before you start the lesson make sure your notebook looks like this:
Picture
This lesson has 2 parts:
1. Cells Video
2. Microscope simulation
Use this online activity from virtual urchin to label your microscope diagram and practice using the microscope.

LESSON 2: cell size and specialisation

By the end of this lesson students will be able to:
  • Name at least 2 specialised cells and explain how they are specialised
  • Calculate the actual size or magnification of an object seen using a microscope

Before you start the lesson make sure your notebook looks like this:
Picture

B2 LESSON 2 VIDEO

EXTRA RESOURCES

  • Look at this animation from the University of Utah to see how big cells are.
  • Have a look at the cells alive website.
  • This is an excellent presentation that explains cell size very well (a bit harder than IGCSE level though)
Inside The Cell from Marina Voloshina

LESSON 3: Movement into and out of cells

By the end of this lesson students will be able to:
  • Describe the process of diffusion
  • Describe the process of osmosis
  • Explain what happens to cells when placed in pure water or strong salt solutions

Before you start the lesson make sure your notebook looks like this:
Picture
This lesson has 2 parts:
1. Diffusion video

2. Osmosis video
The Osmosis song! (some advanced vocabulary)

EXTRA RESOURCES

Try this diffusion simulator or osmosis simulator created by J Kottenhau.
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