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>derivative work: <a href="//commons.wikimedia.org/wiki/User:Jfdwolff" title="User:Jfdwolff">Jfdwolff</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Jfdwolff" title="User talk:Jfdwolff"><span class="signature-talk">talk</span></a>)</li></ul>
2010-12-20 06:30
<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></li></ul>