7. Diffusion, osmosis and active transport

Available for over a year

Dr Alex Lathbridge guides you through important GCSE Biology facts, with a few jokes thrown in too. In this seventh episode of our series all about the cell, Dr Alex Lathbridge breaks down the key facts about how things move in and out of cells. Dr Alex looks at diffusion, where particles move from a higher to lower concentration gradient; osmosis, where water molcules move from a high to low concentration gradient across a selectively permeable membrane ; and active transport, which is movement up a concentration gradient using energy. Take a look on the BBC Bitesize website to find out more about this topic, with revision notes, quizzes and exam-style questions: https://www.bbc.co.uk/bitesize/guides/zs63tv4/revision/1 Suitable for: Combined science AQA Synergy AQA Trilogy Edexcel Eduqas OCR 21st Century OCR Gateway Single science AQA Edexcel Eduqas OCR 21st Century OCR Gateway