Biology Paper 1
Transport in cells
Cell Biology training before the targeted original question drill.
Adaptive teaching card
Make it concrete
Analogy
Transport in cells
Check the direction and the particle first. That tells you whether it is diffusion, osmosis or active transport.
- Diffusion
- Particles move high to low concentration. No energy.
- Osmosis
- Water moves through a partially permeable membrane.
- Active transport
- Substances move low to high concentration using energy.
- Exam move
- Name the process, then describe direction and membrane or energy.
Transport in cells is like a living system solving a small survival problem: each part has a job, and the answer depends on how those jobs connect.
Why now: An analogy helps when the definition feels abstract.
Do this: Match each part of the analogy to the science idea.
Learn it
Diffusion is the net movement from higher to lower concentration.
Osmosis is water movement through a partially permeable membrane.
Active transport moves substances against a concentration gradient using energy.