Is CoTransport Passive or Active? (specifically Na+/Glucose CoTransport)

[manohman]

So Facilitated Diffusion whereby a molecule uses a protein to get across the membrane is considered passive transport.

However, when symport is involved (where two molecules travel together), and one molecule piggybacks on the other molecule's concentration gradient is considered CoTransport.

Is Cotransport considered Secondary Active Transport because the concentration gradient of one of the molecules must be maintained by ATP?

So Sodium Glucose transport is Secondary Active Transport Always?

---

Members don't see this ad.

 

[kraskadva]

Is Cotransport considered Secondary Active Transport because the concentration gradient of one of the molecules must be maintained by ATP?

Yes.

So Sodium Glucose transport is Secondary Active Transport Always?

Yes.

 

[manohman]

Yes.

Yes.

Okay thanks! Wow I cant believe I had it wrong all this time. I assumed Co-Transport would count as Facilitated Diffusion, but facilitated is just molecules going down their concentration gradient with the assistance of a protein.

Thanks man!