October 11, 2016

Diffusion

Diffusion is when particles move from an area of high concentration to an area of low concentration. The particles don’t all take the same net movement (net movement being the overall direction of flow of a substance) Materials like oxygen, carbon dioxide and glucose enter and leave cells by diffusion.
this is useful when a cell is respiring the concentration of oxygen and glucose inside the cell is lower than the surrounding blood so these substances move into the cell. By means of diffusion

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