Cell Structure and Function Essential Question - How do materials move in and out of cells? Lesson...

Cell Structure and FunctionEssential Question - How do materials move in and out of

cells?

Lesson 12 – Cell Transport Introduction

How are living things alike?

Objectives

• Students will be able to:– Observe and describe diffusion occurring– Compare and contrast active and passive

transport– List examples of passive transport in their

daily lives


Warm Up:


Vocabulary Terms• Diffusion – The process by which molecules

move from an area of higher concentration to an area of lower concentration.

• Osmosis – The diffusion of water molecules across a selectively permeable membrane.

• Active Transport – The movement of materials across a cell membrane using cellular energy.

• Passive Transport – The movement of dissolved materials across a cell membrane without using cellular energy.


Inquiry Warm-up – Diffusion in Action


Conclusion Questions:• OBSERVE How long did it take for the food

coloring to spread through the water? • Write an explanation for the changes you

observed. • How would the results be different if you used a

larger amount of water• What do you think would happen if you used hot

water? • CALCULATE Assume that there is one cup of

water in this experiment. How long would it take one drop of food coloring to spread throughout in four cups of water?

The Cell in Its Environment


Crossing the Cell MembraneMolecules move into and out of a cell by means of passive or active transport. Complete the boxes, and describe where the concentration of each substance is high or low.

Water MoleculeImagine that the yellow line is the cell membrane. What is the overall direction in which water will travel as a result of osmosis?


Diffusion at the molecular level

http://osmosisdiffusion2periodtauruasi.wikispaces.com/Types+of+Transport

http://osmosisdiffusion2periodtauruasi.wikispaces.com/Types+of+Transport

The Cell in Its EnvironmentChapter 1 Section 4

• Cells and Heredity - Read Chapter 1 Section 4 in your Cells and Heredity text.

• Answer questions 1-8 on the back of your lab worksheet.

• We will discuss your reading when we are done.

Conclusion

• What are some examples of active and passive transport you have seen in your daily life?


Cell Structure and Function Essential Question - How do materials move in and out of cells? Lesson...

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