Question

Which of the following determines what specific foreign substances our adaptive immune system will be able...

Which of the following determines what specific foreign substances our adaptive immune system will be able to recognize and resist?
(A) Our Genes
(B) Memory cell produciton
(C) Enzyme present at the time of invasion
(D) The type of antigen

The answer give is (A) Our Genes,
I have no idea why it is not (D) the type of antigen since our T cell should recognize the Antigen presented by MHC

Science   Anatomy-And-Physiology   
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Homework Answers

Answer #1

You are not wrong to think so. However the question wants to ask you what makes our body act against certain substances only.

Think of it this way- some people are highly allergic to seafood or pollen or animal dander. Others are not. Now you can say that yes it partially depends upon the type of antigen. But, the more appropriate answer would be the genetic makeup of the individual.

Our genes decide whether we are allergic to some stuff and not others. For example, my genes make me resist reacting against my own synovial fluid. This isn't the case with people suffering from rheumatoid arthritis. So we cannot say that the "antigen" is deciding the response. It is our genetic makeup which makes us see certain things as foreign and not others.

Hope this clears things up

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