BRAINCAKEActive Transport
Active Transport is the movement of molecules or ions into or out of a cell from a region of lower concentration to a region of higher concentration using ATP and carrier proteins.
Active transport differs from passive transport because it uses metabolic energy in the form of ATP and uses carrier proteins to selectively move ions and molecules against their concentration gradient.
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Key terms in this lesson
- hydrolysis
- The breaking of a covalent bond within a molecule using a water molecule.
- ATP
- Adenosine triphosphate, a nucleotide that acts as the immediate energy source in cells, releasing energy when hydrolysed to ADP and phosphate.
More in Transport Across Cell Membranes
- Water Potentital Φ
- Osmosis
- Osmosis in Animal Cells
- Osmosis in Plant Cells
- Sodium-Potassium Pump
- Increasing the Rate of Movement across a Membrane
- Absorption in the Ileum
- Co-transport in Absorption
All 22 lessons in Transport Across Cell Membranes · All AQA AS-level Biology topics