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🎓 IGCSE Biology - The Complete Course: https://www.tes.com/teaching-resource/resource-12989155 IGCSE Chemistry - The Complete Course: 🎓 Complete Teaching Resource (including past exam questions and mark schemes organised by chapter): https://www.tes.com/teaching-resource/resource-13280954 🎓 Student resource (PDF only): https://www.tes.com/teaching-resource/resource-13245244 🎓 All the videos (the complete library on Patreon): https://www.patreon.com/igbiocomplete ☕️ Buy me a coffee - https://www.buymeacoffee.com/ArthurJohnParker Cambridge IGCSE Biology (0610/0970) Chapter 3 - Movement into and out of cells Topic 3.1 - Diffusion For exams from 2025 (core and extended) As always this video follows the Cambridge syllabus exactly and contains absolutely everything you need to know for your final exam! My other channels: @igpecomplete - Cambridge IGCSE PE @ocrpecomplete - OCR GCSE PE Timestamps: 0:00 Contents 0:30 Diffusion 1:41 Importance of diffusion in organisms 3:00 Factors that influence diffusion Core content: - Describe diffusion (as the net movement of particles from a region of their higher concentration to a region of their lower concentration). - State that the energy for diffusion comes from the kinetic energy of random movement of molecules and ions. - State that some substances move into and out of cells by diffusion through the cell membrane. - Describe the importance of diffusion of gases and solutes in living organisms. - Investigate the factors that influence diffusion (surface area, temperature, concentration gradient and distance). There is no extended supplement for topic 3.1.
