How does active transport work?


How do we use energy to move particles from a low to high concentration?

Specifically in things like a root hair cell and in the small intestine when absorbing food molecules.

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2 Answers

Anonymous 0 Comments

The sodium-potassium pump is the classic example of active molecular transport across a membrane. The hydrolysis of ATP induces conformational changes in the transporter protein, which move the molecules across the membrane. More information on the [Wikipedia page](

Anonymous 0 Comments

A proteins can take multiple shapes depending on a number of factors. This is called the proteins “conformation”. For active transport you typically have a molecule that is called “transmembrane” – it has one part sitting outside the cell and another part sitting inside a cell. Some transmembrane proteins will bind to a molecule and then use an energy source – typically ATP to undergo a conformational change which shuttles the molecule into the cell and unbind it from the protein.


Protein binds to molecule, protein uses energy (ATP) to make the protein change shape, protein has now moved the molecule inside the cell.