Hi,

Good question.

The definition of secondary active transport is that you use the favorable electrochemical gradient of one ion to transport another ion across a membrane against its electrochemical gradient.

What chemiosmotic coupling is is the coupling of favourable chemical reactions to the transport of an ion against its electrochemical gradient.

As a result, I wouldn't really call it active transport but more the establishment of a gradient.


I guess if I was pushed in a question to call it primary active transport or secondary active transport I would choose secondary active transport, because that is what it most closely resembles. However, I do consider it its own thing to the best of my knowledge.

I hope this helps!

Katt