Concentration gradient
What Concentration gradient means in Combined Science GCSE, as defined for AQA.
Definitions of Concentration gradient
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Reference: AQA
The difference in concentration between two regions, which blood flow keeps steep by removing the diffused substance and bringing blood with a lower concentration of it.
A difference in concentration between regions, down which the net movement of particles occurs until concentrations become equal or the gradient is removed.
The difference between a lower concentration and a higher concentration that substances are moved against during active transport.
The difference between a more dilute solution and a more concentrated solution, which active transport moves substances against.
A steeper gradient across the partially permeable membrane gives a faster rate, and the gradient changes as water moves.
A steeper gradient increases the rate of diffusion because more particles move down the gradient in a given time.
Topics that use Concentration gradient
- Active transport (AQA GCSE)
- Diffusion (AQA GCSE)
- Osmosis (AQA GCSE)
Related terms
- Diffusion
- Active transport
- Active transport against a concentration gradient
- Adaptations of exchange surfaces
- Blood supply
- Carrier proteins
- Cell respiration
- Cell size and organism size
Using Concentration gradient in the exam
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