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Immunology Terminology Quiz

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Questions and Answers

What is the difference between an immunogen and an antigen?

An immunogen is recognized by the immune system while an antigen induces an immune response.

An immunogen is a carrier molecule while an antigen is a target of the immune response.

An immunogen induces an immune response while an antigen is recognized by the immune system. (correct)

An immunogen is of low molecular weight while an antigen is complex in structure.

What property must an antigen possess to be immunogenic?

Chemical composition

Mode of entry

Foreignness and genetic composition (correct)

Size and stability

Why would a human body likely reject a pig's heart transplant?

Due to the genetic differences between pigs and humans (correct)

The human body cannot recognize the pig's heart

The pig's heart lacks immunogenic properties

Because the pig's heart is too large for a human body

What role does the epitope play in the immune response?

It is recognized by B cells or T cells in the immune system Signup and view all the answers

Why may one person manifest a hypersensitivity reaction to a substance that provokes no reaction in another person?

Because of differences in genetic composition Signup and view all the answers

What type of substance is a hapten, and how does it induce an immune response?

A low molecular weight substance that can only induce a response if bound to an immunogenic molecule Signup and view all the answers

What type of organic substances are generally antigenic?

Proteins and nucleic acids Signup and view all the answers

Why are proteins considered the most immunogenic among different chemical groupings?

Due to their large size and complex structures Signup and view all the answers

What is the molecular weight threshold for antigens to be considered weakly or non-immunogenic?

Below 10,000 Dalton's Signup and view all the answers

Why might a small amount of protein antigen induce an immune response compared to a larger amount of a polysaccharide antigen?

Proteins have higher immunogenicity due to their complex structure Signup and view all the answers

Where do T cells mature in the body?

Thymus Signup and view all the answers

Which cellular components play a crucial role in adaptive immunity?

B lymphocytes and T lymphocytes Signup and view all the answers