00:01
All right, so for this question, we're talking about blood types.
00:04
And so this question's context tells us that the person has a, b, blood type.
00:09
And so here i'm going to draw in a quick little red blood cell example.
00:14
And so when we talk about types of blood, you've probably heard type a blood, type b, a, we also have o, o negative, a whole bunch of different blood types.
00:23
And when we're talking about blood types, we're talking specifically about the identity of what they're called antigens on the surface.
00:30
Of the blood cells.
00:31
So here i'll draw in two little examples of antigens on the surface of this blood cell.
00:37
Here's one and here's the other.
00:39
This one will say is antigen a and here is antigen b.
00:47
So a person with a b blood type has both a and b antigens on the surface of every single blood cell in their body.
00:57
So off the bat, we can cross off answer choice e.
01:01
Because antioice e talks about antibodies, which might sound like antigens.
01:05
However, antibodies are a totally different thing.
01:08
They are located in the blood...