Active transport
What Active transport means in Combined Science GCSE, as defined for AQA.
Definitions of Active transport
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Reference: AQA
The process by which root hair cells absorb nitrate ions from soil water, used because the concentration of nitrate ions in soil water is usually lower than inside the root hair cell.
Moves substances from a more dilute solution to a more concentrated solution, against a concentration gradient, and requires energy from respiration.
Moves substances from a lower concentration to a higher concentration, against the concentration gradient, using energy from respiration.
Moves substances against a concentration gradient, from a lower concentration to a higher concentration, using energy from respiration.
Moves mineral ions against a concentration gradient using energy from respiration and carrier proteins in the membrane.
Root hair cells contain many mitochondria to release energy for this movement of mineral ions.
Topics that use Active transport
- Active transport (AQA GCSE)
- Plant organ system (AQA GCSE)
- Uses of glucose from photosynthesis (AQA GCSE)
Related terms
- Osmosis
- Active transport against a concentration gradient
- Amino acids
- Calculating rates from measurements
- Carrier proteins
- Cell respiration
- Cell specialisation and adaptation
- Cell wall
Using Active transport in the exam
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