Biology A-Level
facilitated diffusion
What facilitated diffusion means in Biology A-Level, as defined for AQA.
Definition of facilitated diffusion
Check what you remember
Read the wording for your board, then hide it and explain facilitated diffusion in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
Passive movement of substances down a gradient without ATP, using channel proteins or carrier proteins.
Topics that use facilitated diffusion
- Transport across cell membranes (AQA A-Level)
Related terms
- active transport
- betalain pigment leakage
- calibration curve
- colorimetry and absorbance
- cristae
- Fluid mosaic model
- glycoproteins and glycolipids
- hydrophilic heads and hydrophobic tails
Using facilitated diffusion in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Biology questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Biology A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge