B2 - Diffusion Definition Cellular diffusion 0.0 / 5 ? BiologyCells, tissues and organsGCSEAQA Created by: Connie JoyceCreated on: 17-08-14 23:17 What is Diffusion? Diffusion is the spreading out of particles from an area of high concentration to an area of low concentration. 1 of 6 What states of matter does diffusion occur? Fluids and gases (where particles can move freely). 2 of 6 How does diffusion occur in perfume? Perfume particles are highly concentrated into a small space where it spreads out to mix with air particles. 3 of 6 What gets diffused in cells. Dissolved substances can move in and out of cell membranes by diffusion. 4 of 6 What size molecules can be diffused? Only very small molecules can be diffused through cell membranes e.g. oxygen, glucose, amino acids, water. 5 of 6 How does cellualr diffusion work? Larger particles are broke down and move from the higher concentration (outside the cell) to the lower concentration (inside the cell). 6 of 6
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