0:00
Hi everyone.
00:01
My name is eric and let's review problem three.
00:04
So in this question, we are going to be focusing on a skin graft.
00:10
Now a skin graft is a technique used to transplant skin onto a patient.
00:16
And as it is shown here, it is foreign skin.
00:19
So this would be from another source or it could be even artificial.
00:23
It's going to be transplanted onto a patient to help heal the skin.
00:27
And this is essentially useful for patients that are having damaged skin, such as burn victims.
00:35
And so in this scenario here, we have a rejection of this transplantation of the skin.
00:42
And so let's look through each of the answer choices provided to see what could explain this rejection.
00:49
So let's go through one by one and eliminate all of the answers that would not match up.
00:54
So we have five different answer choices.
00:56
And let's walk through each answer choice.
01:00
So first off, we have a, which is destruction of virus -infected cells.
01:14
And then b, we have tolerance.
01:19
C, we have antibody -mediated immunity.
01:32
D, we have secondary immune response.
01:42
And finally, e, we have a cell -mediated immune response.
01:52
Now, let's go through each answer choice and see what we'll.
01:55
Would make sense for a rejection of the skin graft.
01:59
So for a, destruction of a virus -infected cell.
02:04
For a skin graft, there is no virus involved.
02:07
So this rejection is not explained by a virus infection.
02:13
So a is not a correct answer...