Biology - B3.1.1 Dissolved Substances 4.0 / 5 based on 2 ratings ? BiologyExchange of materialsGCSEAQA Created by: MillieCreated on: 10-04-13 20:27 Haw do dissolved Substances move? Diffusion and Active Transport 1 of 16 What is the movement of water across a partially permeable membrane called? Osmosis 2 of 16 Which direction does water move across a partially permeable membrane? From a dilute to a more concentrated solution 3 of 16 What causes osmosis? A difference in the concentrations of the solutions inside and outside a cell 4 of 16 What do most soft drinks contain? Water, sugar and ions 5 of 16 Why do sports drinks contain sugar? To replace the sugar used in energy release during the activity 6 of 16 Why do sports drinks contain water and ions? To replace the water and ions lost during sweating. 7 of 16 What is active transport? When substances are absorbed against a concentration gradient 8 of 16 What does active transport need? It requires the use of energy from respiration 9 of 16 How does having a large surface area and a small diffusion distance affect efficiency of exchange? Increases it 10 of 16 How is surface area increased in lungs? Alveoli 11 of 16 What do the villi provide? Both a large surface area with an extensive network of capillaries to absorb the products of digestion by diffusion and active transport 12 of 16 Where are the lungs found? Thorax 13 of 16 What protects the lungs? Ribcage 14 of 16 How does air move into the lungs? The ribcage moves out and up and the diaphragm becomes flatter 15 of 16 What is the movement of air into and out of the lungs called? Ventilation 16 of 16
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