Osmosis 0.0 / 5 ? BiologyCells, tissues and organsGCSEAQA Created by: Hannah100Created on: 04-04-14 18:58 What is osmosis? The movement of water molecules across a partially permeable membrane from an area of high concentration to an area of low concentration. 1 of 6 What is tissue fluid made up of? Tissue fluid is basically water with oxygen and glucose dissolved in it. 2 of 6 What is diffusion? Where particles move from an area of high concentration to an area of low concentration. 3 of 6 Whereabouts in a leaf does carbon dioxide diffuse? It diffuses into the air spaces, then into the cells where photosynthesis happens. 4 of 6 What two substances diffuse out of stomata in a leaf's surface? Oxygen (produced in photosynthesis) and water vapour. 5 of 6 What does a leaf's flattened shape help it to do? It increases the area of the exchange surface. 6 of 6
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