00:01
All right, so here i've made a very focused replication of this diagram, including only the flow of the chloride ions.
00:08
And so first over here at the basolateral membrane, we have a chloride antiporter, so chloride gets pumped in, all bicarbonate ions get pumped out.
00:16
It's important to note that this antiporter is net neutral in terms of charges.
00:19
We have minus charge coming in and minus charge coming out.
00:22
However, over here at the apical membrane, which is the part of the, or the specific channel that the question is asking about, we have chloride leaving the cell with nothing essentially coming back into the cell.
00:35
And so we have a net loss of chloride ions.
00:39
However, this is generally compensated for by the loss of protons from inside the cell outwards, thanks to the h -plus -k -plus atp channel...