Diffusion is the spreading out of the particles of a gas, or of any substance in solution.
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What is 'net movement' in terms of diffusion?
As particles move randomly, there is a 'net' movement from an area of high concentration to an area of lower concentration.
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What is the difference in concentration in terms of diffusion?
The difference in concentration between two areas is called THE CONCENTRATION GRADIENT.
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What is an example of diffusion?
The diffusion of oxygen into the cells of the body from the bloodstream as the cells are respiring (and using up oxygen) or the diffusion of carbon dioxide into actively photosynthesising plant cells.
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What determines the net movement of particles across a cell membrane?
The concentration on either side of the membrane. The larger the difference in concentration, the faster the rate of diffusion.
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Other cards in this set
Card 2
Front
What is 'net movement' in terms of diffusion?
Back
As particles move randomly, there is a 'net' movement from an area of high concentration to an area of lower concentration.
Card 3
Front
What is the difference in concentration in terms of diffusion?
Back
Card 4
Front
What is an example of diffusion?
Back
Card 5
Front
What determines the net movement of particles across a cell membrane?
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