00:01
Okay, so for this question, we are looking at liver cells.
00:05
And here i kind of drew liver cell in red here.
00:11
So we see outlined by this red circle.
00:14
And we are told that there is a higher concentration of glucose in the cell than outside of the cell.
00:20
And here, i just did a three to one ratio.
00:22
There's three times as much glucose in the liver cell, then outside in the surrounding fluid.
00:28
So we are trying to bring in even more glucose into the cell, and we are asked to identify how this would be possible.
00:39
So first of all, we have to understand there's a few different ways of things moving around in general.
00:45
So there's osmosis, of course, which is referring to water.
00:48
We're not talking about water here, so don't need to even pursue that any further.
00:52
There's diffusion where things move in a concentration gradient, meaning to go from where there's more of things to where there's less to evenly disperse things.
01:03
So if things were to evenly disperse, we have more glucose in the cell.
01:08
So glucose would leave to go out of the cell, right? well, yes, but in this case, glucose is too large.
01:17
So glucose is too large.
01:19
So on its own, it can't move in and out of the cell.
01:24
It cannot diffuse by natural process because it will not pass the membrane, which is why we have things called integral proteins, which i kind of drew in blue here...