00:02
So what i'm drawing here is a single bacterial cell.
00:07
And what we're going to do is we're going to expose this bacterial cell to acid, which is simply an excess of hydrogen ions drawn here as h plus.
00:20
Now, the hydrogen ion concentration or ph within the equal eye cell is relatively constant at about 7 .5.
00:34
But in response to an acid treatment, some of these hydrogen ions are able to diffuse into the cell and increase the hydrogen concentration, which would result in a drop in ph.
00:56
Now, what's interesting is that the cell is able to recover very quickly and return the ph back to that critical.
01:06
Value of about 7 .5, which means that it must somehow be controlling the level of h -plus ions within the cell.
01:17
So the question also mentions that atp inhibitors block the recovery of this ph control.
01:27
So to understand that, we need to know about atpase enzymes.
01:34
So these are membrane anchors.
01:37
Enzymes, which in our cells allow their present in the inner membrane in the mitochondria.
01:50
And what they do in our cells, in a mitochondria over here, for example, is they allow numerous h -plus ions to flow down their concentration gradient...