Movement in and out of cells

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Presentation transcript:

Movement in and out of cells

Learning Objectives Define diffusion as the net movement of molecules from a region of their higher concentration to a region of their lower concentration down a concentration gradient, as a result of their random movement Describe the importance of diffusion of gases and solutes and of water as a solvent

Getting in and out of cells How does this work? ?

So how does this happen? In 2 ways Diffusion Active Transport 4

They both move molecules Active transport works ACTIVELY Diffusion just happens 5

6

7

How can this be helped? A diffusion gradient This means lots on one side and little on the other

How can this be helped? A large surface area For the stuff to diffuse/active transport through

Large surface area 10