Example of primary active transport, where energy from hydrolysis of ATP is directly coupled to the movement of a specific substance across a membrane independent of any other species.
<ul><li><a href="//commons.wikimedia.org/wiki/File:Scheme_sodium-potassium_pump-en.svg" title="File:Scheme sodium-potassium pump-en.svg">Scheme_sodium-potassium_pump-en.svg</a>: <a href="//commons.wikimedia.org/wiki/User:LadyofHats" title="User:LadyofHats">LadyofHats</a> Mariana Ruiz Villarreal</li>
<li><a href="//commons.wikimedia.org/wiki/File:Scheme_sodium-potassium_pump-ca.svg" title="File:Scheme sodium-potassium pump-ca.svg">Scheme_sodium-potassium_pump-ca.svg</a>:  <a href="//commons.wikimedia.org/wiki/User:Imartin6" title="User:Imartin6">Imartin6</a></li>
<li>derivative work:  <a href="//commons.wikimedia.org/wiki/User:Angelito7" title="User:Angelito7">Angelito7</a> (traslation to Spanish)</li></ul>
2012-05-17 17:06
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