Section 3
Active Transport
Book
Version 32
By Boundless
By Boundless
Boundless Biology
Biology
by Boundless
3 concepts
![Thumbnail](../../../../../../figures.boundless-cdn.com/18639/square/figure-05-03-01.jpeg)
Electrochemical Gradient
To move substances against the membrane's electrochemical gradient, the cell utilizes active transport, which requires energy from ATP.
![Thumbnail](../../../../../../figures.boundless-cdn.com/18641/square/figure-05-03-03.jpeg)
Primary Active Transport
The sodium-potassium pump maintains the electrochemical gradient of living cells by moving sodium in and potassium out of the cell.
![Thumbnail](../../../../../../figures.boundless-cdn.com/18642/square/figure-05-03-04.jpg)
Secondary Active Transport
In secondary active transport, a molecule is moved down its electrochemical gradient as another is moved up its concentration gradient.