Biology-B1-Diffusion 5.0 / 5 based on 1 rating ? BiologyExchange of materialsGCSEAQA Created by: tonisha_Created on: 25-09-21 15:09 What is diffusion? spreading out of particles from an area of high concentration to an area of low concentration 1 of 19 What is one example of diffusion taking place? cell membrane 2 of 19 What are three examples of products that have to diffuse either in or out of a cell? oxygen carbon dioxide urea 3 of 19 Outside of the cell what is the concentration like of oxygen? high 4 of 19 What is the concentration of oxygen like inside the cell? low and spreads out a lot 5 of 19 Therefore the oxygen will do what? diffuse into the cell 6 of 19 They oxygen will then produce what in respiration? energy 7 of 19 However a waste product of this is what? carbon dioxide 8 of 19 What is the concentration of carbon dioxide outside of the cell? What is the concentration of carbon dioxide inside of the cell? low high 9 of 19 Therefore the carbon dioxide does what? diffuses out of the cell 10 of 19 Urea is ______ _______ produced in cells? waste product 11 of 19 It therefore_______ out of the cell into the blood _______ and is _______ by the kidneys? diffuses plasma excreted 12 of 19 What are the 3 factors which affect the rate of diffusion? concentration gradient temperature surface area 13 of 19 Concentration Gradient ---------------------- How does this affect diffusion? the greater the concentration gradient, the faster the rate of diffusion 14 of 19 Temperature ------------------ How does temp. affect the rate of diffusion? the higher the temperature, the faster the rate of diffusion 15 of 19 Why is it faster here? Therefore the particles are? because the particles have more kinetic energy moving faster 16 of 19 What is another factor? (surface area) the larger the surface area, the faster the rate of diffusion 17 of 19 why is this? more particles are able to pass at once 18 of 19 What is another factor? the thinner the cell membrane, the faster the rate of diffusion 19 of 19
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