00:01
Here we're trying to look at why oxygen is required for aerobic cellular respiration.
00:08
Okay, now obviously the goal of cellular respiration is to make lots and lots of atp.
00:13
Atp can be made in fermentation without oxygen in an anaerobic capacity, but in eukaryotic organisms where oxygen is present, you can make a lot more atp.
00:29
Okay.
00:30
Now, we need to establish a proton gradient so that there's enough hydrogen ions out in the intermembrane space to diffuse through atp synthase.
00:42
And when this happens, it's going to power this motor -like mechanism to do chemi -osmosis, which combines adp, a dynosine diphosphate, and an inorganic phosphate to become atp, which is the energy, currency of cells.
01:05
But in order to get this proton gradient to power atp synthase, we have to pump out these excess hydrogen ions out of the mitochondrial matrix into the intermembrane space.
01:21
And this happens through a process of active transport.
01:26
There's a lower concentration of hydrogen ions in the matrix, and they're trying to be pumped out of these proteins.
01:36
Into the inner membrane space...