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Specific Defenses of the Human Body Quiz

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Specific Defenses of the Human Body Quiz

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Questions and Answers

Which of the following best defines an antigen?

A protein secreted by plasma cells in response to an infection

A molecule that breaks down antigen fragments in the host cell

A small, accessible region of an antibody to which an antigen receptor binds

Any substance that induces a B or T cell response found on viruses, bacteria, tumors, and normal cells of the body (correct)

What is the primary function of an antibody?

To induce cell proliferation in response to an infection

To recognize a small, accessible region of an antigen

To bind to the Major Histocompatibility Complex (MHC) molecule on the host cell surface

To serve as the soluble form of the antigen receptor (correct)

What is the process by which T cells bind to both the antigen fragment and the MHC molecule on the cell surface?

Antigen Presentation (correct)

Antigen Recognition

Immunoglobulin Binding

Pathogen Infectivity

What characteristic of adaptive immunity refers to the lack of reactivity against an animal’s molecules and cells?

Self-Tolerance Signup and view all the answers

In antigen recognition by B cells, what does the B cell secrete after binding to the epitope of an antigen?

Immunoglobulin G (IgG) Signup and view all the answers

Which type of immunity relies on the pathogen-specific recognition ability of lymphocytes?

Adaptive immunity Signup and view all the answers

Where are B cells produced and matured?

Bone marrow Signup and view all the answers

What is the main function of killer T cells?

Destroying infected body cells Signup and view all the answers

Where are naive T cells activated by binding to a foreign peptide bound to a class II MHC protein?

Peripheral lymphoid organ Signup and view all the answers

Which type of immunity is mediated by antibodies produced by B cells?

Humoral immunity Signup and view all the answers