BIOLOGY DIFFUSION 0.0 / 5 ? BiologyCells, tissues and organsGCSEAQA Created by: Charlotte4Created on: 30-11-13 11:56 what is the definition of diffusion? The movement of particles in a gas or particles in a solution from a region of high concentration to an area of low concentration. 1 of 7 what happens if the concentration is equal? There is no net movement. 2 of 7 How do you measure the rate of diffusion? The greater the difference in concentration the faster the rate of diffusion. 3 of 7 Why does oxygen not diffuse in and out of the cell continuously? -Because the oxygen concentration doesn't build up in the cell as it is used up chemical reactions and the oxygen is constantly being supplied. 4 of 7 If the cell doesn't want the ................... to leave then the .......................... will.............them. particles,cell membrane,stop 5 of 7 When particles diffuse in,is energy used? No energy is used. 6 of 7 When particles diffuse out,is energy used? yes energy is used. 7 of 7
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