00:01
So this question revolves around reading a dissociation graph for hemoglobin that we make.
00:05
So on the excess axis, you have the partial pressure of oxygen in the atmosphere, and on the y -axis, you have the percent of the hemoglobin saturated with that oxygen.
00:18
For a normal person, as your partial pressure of oxygen in the air increases, that means there is more oxygen available for hemoglobin to bind to itself, meaning that its saturation increases since it's binding more of that oxygen.
00:34
So for normal adult humans, we have mostly hemoglobin a inside of our blood cells capturing that oxygen.
00:44
In fetuses, however, they have a different type of hemoglobin called hemoglobin f.
00:52
Hemoglobin f has a better binding affinity for oxygen, meaning if you put hemoglobin a and hemoglobin f inside the same.
01:00
Container and they're fighting for a single molecule of oxygen, it's more likely to bind the f than the a, just because f has a better binding affinity for it.
01:14
So when we're talking about its advantages in a pregnant mother, you have to remember that an umbilical cord is feeding a blood supply and nutrients to the fetus inside the mother.
01:30
So we'll call this first vein or artery...