Concentration gradient
What Concentration gradient means in Biology GCSE, as defined for AQA.
Definitions of Concentration gradient
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Reference: AQA
The difference in concentration between two regions separated by a membrane; a larger difference gives a faster net rate because more particles move from the higher to the lower concentration region.
The difference in sugar concentration between the gut and the blood; in this example the gut concentration is lower than the blood concentration.
The difference in water vapour concentration between the leaf's interior and the surrounding air, which drives diffusion out of the leaf.
Topics that use Concentration gradient
- Active transport (AQA GCSE)
- Diffusion (AQA GCSE)
- Plant organ system (AQA GCSE)
Related terms
- Active transport
- Concentration gradients
- Diffusion
- Osmosis
- Respiration
- Adaptations of root hair cells
- Aerobic respiration
- Anaerobic respiration
Using Concentration gradient in the exam
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