Transport Across Cell Membranes
Diffusion, osmosis and active transport in cells, organisms and experimental systems.
How to study GCSE Biology
Link structure to function, explain mechanisms, interpret biological evidence and rehearse the exact practical and paper requirements for your board.
Core concepts
Concept 1
Net movement depends on gradients, membrane properties and energy requirements.
Exam cue: Identify the scope and evidence that control the transport across cell membranes decision before selecting a rule or method.
Concept 2
Osmosis concerns water movement across a partially permeable membrane.
Exam cue: Connect net movement depends on gradients, membrane properties and energy requirements. with osmosis concerns water movement across a partially permeable membrane. and test the conclusion against rate evidence must be interpreted using surface area, distance, temperature and concentration..
Concept 3
Rate evidence must be interpreted using surface area, distance, temperature and concentration.
Risk pitfalls and guardrails
Applying a neighbouring topic or route rule without checking whether it belongs to Transport Across Cell Membranes.
Guardrail: Check the current official source, route and assessment boundary before relying on a memorised rule.
Memorising a label or number without being able to interpret evidence, explain the boundary or apply the method.
Guardrail: Check the current official source, route and assessment boundary before relying on a memorised rule.
Memory anchors
Transport Across Cell Membranes
Diffusion, osmosis and active transport in cells, organisms and experimental systems.
Transport Across Cell Membranes: core principle
Net movement depends on gradients, membrane properties and energy requirements.
Transport Across Cell Membranes: application
Osmosis concerns water movement across a partially permeable membrane.
Transport Across Cell Membranes: evidence check
Rate evidence must be interpreted using surface area, distance, temperature and concentration.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
Which statement defines net diffusion across a cell membrane?
Which description identifies osmosis in living tissue?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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