Osmosis and Active Transport 1.0 / 5 based on 1 rating ? BiologyRespiration and exerciseGCSEAQA Created by: Hannah TaylorCreated on: 11-05-13 19:48 What is osmosis? Osmosis is the movement of water molecules from an area of high to low concentration, across a partially permable membrane 1 of 5 Does osmosis require energy? No, just like diffusion, osmosis is random and requires no energy from the cell 2 of 5 What is active transport? The movement of substances across partially permable membranes against the concentration gradient, using energy 3 of 5 Give two examples of active transport in use? Root hair cells absorbing mineral ions from dilute solutions in the soil and Villi in the small intestine absorbing glucose 4 of 5 Describe the process of active transport? The useful molecule is put into the transport protein which rotates and releases the molecule inside the cell (using energy) and rotates back again 5 of 5
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