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MHC I and MHC II Functions in the Immune System

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MHC I and MHC II Functions in the Immune System

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Questions and Answers

What is the primary function of a B-cell in the immune response?

To present antigens to T H cells (correct)

To produce antibodies

To activate cytotoxic T cells

To recognize and eliminate infected cells

Which type of immunity is involved in the interaction between B cells and T H cells?

Innate immunity

Acquired immunity

Cell-mediated immunity

Humoral immunity (correct)

What is the term for the region on an antigen that is recognized by a T cell receptor?

Antigenic determinant

Paratope

MHC molecule

Epitope (correct)

What type of MHC molecule is involved in the presentation of antigens by B cells to T H cells?

MHC-II Signup and view all the answers

What is the term for cells that can internalize, process, and present antigens to T cells?

Antigen-presenting cells Signup and view all the answers

Which type of MHC is expressed on all nucleated cells?

MHC I Signup and view all the answers

What is the primary function of MHC II?

To present antigen to CD4+ T cells Signup and view all the answers

What is the result of the presence of foreign antigens on a cell that expresses MHC I?

The cell is targeted for destruction by CD8+ T cells Signup and view all the answers

What is the unique characteristic of each lymphocyte?

It recognizes and responds to a single epitope Signup and view all the answers

What is the role of CD4 on TH cells?

It binds to MHC II on antigen-presenting cells Signup and view all the answers

What is the primary difference between classical antigens and superantigens?

The requirement for antigen-presenting cells Signup and view all the answers

Which type of antigen requires antigen-presenting cells (APCs) to process and present epitopes?

Only classical antigens Signup and view all the answers

What is the role of MHC-II molecules in the immune response?

To present antigens to T-cells Signup and view all the answers

Which of the following is a characteristic of superantigens?

They bind directly to MHC-II molecules Signup and view all the answers

What is the main difference between MHC-II restriction and classical antigen presentation?