B3 0.0 / 5 ? BiologyGCSEAQA Created by: Ashley WarnesCreated on: 12-04-13 10:32 What is osmosis? When water molecules move from a high concentrated area to one of low concentration throgh a partially permeable membrane. 1 of 5 What is active transport? The movement of molecules, against the concentration gradient, using energy. 2 of 5 Where are the exchange surfaces? Kidneys, lungs and intestines 3 of 5 What is gas exchange? the movement of oxygen into the blood and carbon dioxide into the air 4 of 5 where does gas exchange occur? in the alveoli in the lungs 5 of 5
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