Difusion. 0.0 / 5 ? BiologyCells, tissues and organsGCSEAQA Created by: tom.riddCreated on: 04-03-14 20:40 Definition of diffusion. The spreading of particles from a high concentration to a low concentration. 1 of 5 Definition of osmosis. The spreading of water molecules from a high concentration to a low concentration. 2 of 5 Name two small molecules. Oxygen, glucose, amino acids and water. 3 of 5 Name a large molecule. Proteins, starch. 4 of 5 Cell membranes are doing two things. They hold the cell together and let things in and out. 5 of 5
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