Mastering T Cell-Mediated Immunity
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Questions and Answers

Which type of antigens require T helper cell interaction to produce a B cell humoral response?

  • T cell dependent antigens (correct)
  • Antigens with a large number of identical epitopes
  • Protein-based antigens
  • T cell independent antigens

What is the main difference between T cell dependent and T cell independent responses?

  • T cell dependent responses can class switch, while T cell independent responses cannot
  • T cell dependent responses require T helper cell interaction, while T cell independent responses do not
  • T cell dependent responses are long-lived, while T cell independent responses are short-lived
  • T cell dependent responses result in B memory cells and effector cells, while T cell independent responses do not (correct)

What is the process by which antibodies improve their ability to bind to antigens with time and subsequent interactions with antigen?

  • Affinity maturation (correct)
  • Positive selection
  • Antibody production
  • Class switching

What type of antigens do not consist of a large number of very similar or identical epitopes?

<p>Protein-based antigens (D)</p> Signup and view all the answers

What determines the properties of a protein?

<p>The length of the protein chain (A)</p> Signup and view all the answers

What is the role of T helper cells in the activation of B cells?

<p>T helper cells provide costimulatory molecules (A)</p> Signup and view all the answers

Where does the process of positive selection for strong antibody binding B cells occur?

<p>The germinal center (C)</p> Signup and view all the answers

What type of cells are plasma cells?

<p>Effector cells (D)</p> Signup and view all the answers

What is the result of class switching in antibodies?

<p>Change in the nature of the antibody molecule's constant region (B)</p> Signup and view all the answers

What is the process by which B cells undergo further differentiation and antibody production?

<p>T cell help (A)</p> Signup and view all the answers

Which cells produce antibodies in the parafollicular region?

<p>B cells (A)</p> Signup and view all the answers

What is the specialized structure produced after maturation of B cells within the follicle?

<p>Germinal center (C)</p> Signup and view all the answers

What are the processes that occur in the germinal center during B cell maturation?

<p>Class switching and affinity maturation (B)</p> Signup and view all the answers

What is the function of IgA immunoglobulin?

<p>Important in mucosal immunity (D)</p> Signup and view all the answers

What is affinity maturation?

<p>Positive selection of B cells with increased antigen binding (A)</p> Signup and view all the answers

Which cells bind small amounts of antigen within the germinal center?

<p>Follicular dendritic cells (D)</p> Signup and view all the answers

Where do some of the antibody secreting cells of the germinal center migrate to?

<p>Bone marrow (A)</p> Signup and view all the answers

What do memory B cells do?

<p>Respond quickly to cognate antigen (C)</p> Signup and view all the answers

How frequent is somatic mutation in the variable region genes compared to nonvariable region genes?

<p>Up to 1 million times as frequent (C)</p> Signup and view all the answers

What is the result of the competition between mutated B cells in the germinal center?

<p>Production of an efficient population of antigen specific B cells (B)</p> Signup and view all the answers

Which type of immunity relies on close-range interactions between immune effector T cells and the target?

<p>Cell-mediated immunity (C)</p> Signup and view all the answers

What is the main function of cytotoxic lymphocytes in T cell-mediated immunity?

<p>Direct killing of infected host cells (A)</p> Signup and view all the answers

Which type of immunity is most effective against extracellular pathogens?

<p>Humoral immunity (C)</p> Signup and view all the answers

What type of antigens do B cells respond to in a T cell independent manner?

<p>Polysaccharide antigens (D)</p> Signup and view all the answers

What is the main characteristic of T cell independent antigens?

<p>Limited properties for host defense (B)</p> Signup and view all the answers

What is the role of cytokines in T cell-mediated immunity?

<p>Amplification of the inflammatory response (C)</p> Signup and view all the answers

What is the main function of immunoglobulin molecules in humoral immunity?

<p>Binding to antigen molecules (A)</p> Signup and view all the answers

What type of antigens do T cells respond to?

<p>Small peptide antigens (A)</p> Signup and view all the answers

What is the main function of B cells in the immune response?

<p>Production of antibodies (C)</p> Signup and view all the answers

How do humoral immunity and cell-mediated immunity differ?

<p>Humoral immunity involves the production of antibodies, while cell-mediated immunity involves the direct killing of infected host cells (B)</p> Signup and view all the answers

Which immunoglobulin molecule is usually a cluster of five individual units?

<p>IgM (D)</p> Signup and view all the answers

Which region of an antibody molecule is quite flexible, allowing the variable end to adapt to the configuration of the antigen?

<p>Hinge region (C)</p> Signup and view all the answers

Which fragment of an immunoglobulin molecule consists of a light chain and the associated part of the heavy chain?

<p>Fab fragment (C)</p> Signup and view all the answers

Which immunoglobulin molecule is present in secretions from the respiratory, gastrointestinal, and genitourinary mucosa?

<p>IgA (A)</p> Signup and view all the answers

Which immunoglobulin molecule plays a role in defense against parasites and provoking certain forms of allergy?

<p>IgE (A)</p> Signup and view all the answers

Which immunoglobulin molecule is the principal type formed in response to the majority of infectious agents?

<p>IgG (B)</p> Signup and view all the answers

Which immunoglobulin molecule is the first antibody to be synthesized in a primary immune response?

<p>IgM (B)</p> Signup and view all the answers

Which immunoglobulin molecule is efficient in combining with large particulate antigens such as fungi?

<p>IgM (A)</p> Signup and view all the answers

Which immunoglobulin molecule binds specifically to mast cells and plays a role in defense against parasites and provoking certain forms of allergy?

<p>IgE (B)</p> Signup and view all the answers

Which immunoglobulin molecule is normally present in only small quantities in the blood of most people, but greatly increased in allergic individuals?

<p>IgE (A)</p> Signup and view all the answers

Which of the following is NOT one of the five classes of immunoglobulin in humans?

<p>IgC (D)</p> Signup and view all the answers

Which classes of immunoglobulin in humans are further divided into subclasses?

<p>IgA and IgG (A)</p> Signup and view all the answers

What determines the specific effector function of an antibody?

<p>The constant region of the heavy chain (C)</p> Signup and view all the answers

What confers specificity of an antibody for a given antigen?

<p>The variable region of the heavy chain (B)</p> Signup and view all the answers

What is the term for antibodies produced by a large number of individual clones of B cells?

<p>Polyclonal antibodies (B)</p> Signup and view all the answers

Under what condition may antibodies be monoclonal antibodies?

<p>When there is a cancer of the plasma cells (B)</p> Signup and view all the answers

What is the term for the ability to produce monoclonal antibodies to desired antigens at will?

<p>Monoclonal antibody production (B)</p> Signup and view all the answers

What is the most common method for producing monoclonal antibodies?

<p>Hybridoma production (C)</p> Signup and view all the answers

What is the term for the structure produced after maturation of B cells within the follicle?

<p>Germinal center (A)</p> Signup and view all the answers

What is the main function of cytotoxic lymphocytes in T cell-mediated immunity?

<p>To kill infected cells (C)</p> Signup and view all the answers

Which immunoglobulin molecule is usually a pair of units?

<p>IgA (A)</p> Signup and view all the answers

What is the main function of IgA immunoglobulin?

<p>Combining with potentially harmful ingested or inhaled antigens (C)</p> Signup and view all the answers

Which immunoglobulin molecule is normally present in only small quantities in the blood of most people, but greatly increased in allergic individuals?

<p>IgE (B)</p> Signup and view all the answers

What is the result of treatment with enzymes on an immunoglobulin molecule?

<p>Formation of Fab fragments (C)</p> Signup and view all the answers

Which immunoglobulin molecule is the first antibody to be synthesized in a primary immune response?

<p>IgM (C)</p> Signup and view all the answers

Which type of immunity is IgG the principal type of antibody molecule formed in response to?

<p>Extracellular pathogens (C)</p> Signup and view all the answers

What is the main function of cytotoxic lymphocytes in T cell-mediated immunity?

<p>Killing infected cells (D)</p> Signup and view all the answers

What is the main function of B cells in the immune response?

<p>Antibody production (B)</p> Signup and view all the answers

What is the main difference between T cell dependent and T cell independent responses?

<p>The involvement of T cells (D)</p> Signup and view all the answers

What is the term for the ability to produce monoclonal antibodies to desired antigens at will?

<p>Monoclonal antibody production (C)</p> Signup and view all the answers

Which of the following is NOT one of the five classes of immunoglobulin in humans?

<p>IgC (A)</p> Signup and view all the answers

What is the main function of B cells in the immune response?

<p>Produce antibodies (D)</p> Signup and view all the answers

What determines the specific effector function of an antibody?

<p>Constant region of the heavy chain (C)</p> Signup and view all the answers

Which immunoglobulin molecule is present in secretions from the respiratory, gastrointestinal, and genitourinary mucosa?

<p>IgA (D)</p> Signup and view all the answers

Which immunoglobulin molecule is usually a cluster of five individual units?

<p>IgM (B)</p> Signup and view all the answers

What confers specificity of an antibody for a given antigen?

<p>Variable region of the heavy chain (D)</p> Signup and view all the answers

Which classes of immunoglobulin in humans are further divided into subclasses?

<p>IgA and IgG (A)</p> Signup and view all the answers

What do memory B cells do?

<p>Produce antibodies (A)</p> Signup and view all the answers

Under what condition may antibodies be monoclonal antibodies?

<p>In the disease multiple myeloma (B)</p> Signup and view all the answers

What type of antigens do not consist of a large number of very similar or identical epitopes?

<p>T cell independent antigens (B)</p> Signup and view all the answers

Which of the following is NOT one of the five classes of immunoglobulin in humans?

<p>IgE (B)</p> Signup and view all the answers

Which immunoglobulin molecule is normally present in only small quantities in the blood of most people, but greatly increased in allergic individuals?

<p>IgE (C)</p> Signup and view all the answers

What is the main function of B cells in the immune response?

<p>Producing antibodies (A)</p> Signup and view all the answers

Which immunoglobulin molecule is the first antibody to be synthesized in a primary immune response?

<p>IgM (A)</p> Signup and view all the answers

What is the main function of B cells in the immune response?

<p>Produce antibodies (B)</p> Signup and view all the answers

Which immunoglobulin molecule is efficient in combining with large particulate antigens such as fungi?

<p>IgM (C)</p> Signup and view all the answers

Which immunoglobulin molecule is the principal type formed in response to the majority of infectious agents?

<p>IgG (B)</p> Signup and view all the answers

Which system of soluble proteins plays a critical role in self-defense?

<p>The complement system (B)</p> Signup and view all the answers

Which pathway of complement activation is triggered by antigen-antibody interactions?

<p>The classical pathway (C)</p> Signup and view all the answers

Which immunoglobulin antibodies are most efficient in activating complement?

<p>IgM antibodies (D)</p> Signup and view all the answers

Which autoimmune disease is associated with a specific form of postsynthetic protein modification that forms citrullinated peptides?

<p>Rheumatoid arthritis (A)</p> Signup and view all the answers

What is the main factor that contributes to the association of a particular class II HLA allele with an autoimmune disease?

<p>Ability to bind and present autoantigens (A)</p> Signup and view all the answers

What is a risk factor for severe rheumatoid arthritis and is also responsible for the production of citrullinated peptides in the lung?

<p>Smoking (D)</p> Signup and view all the answers

Which type of immune response are many (but not all) of the genes involved in propensity for, particularly autoimmune response, related to?

<p>MHC (HLA) system (B)</p> Signup and view all the answers

Which diseases tend to have an autoimmune component and are associated with certain class II HLA types?

<p>Type 1 diabetes and rheumatoid arthritis (C)</p> Signup and view all the answers

Which proteins fall into the two major groups within the HLA system?

<p>MHC class I proteins and MHC class II proteins (C)</p> Signup and view all the answers

Which genes control the class I proteins within the HLA system?

<p>HLA-A, HLA-B, and HLA-C genes (D)</p> Signup and view all the answers

How many different allelic genes can occupy the gene loci within the HLA system?

<p>More than 1,200 (A)</p> Signup and view all the answers

Which HLA type is associated with a particular type of arthritis of the spine and the sacroiliac joints?

<p>HLA-B27 (D)</p> Signup and view all the answers

What does the presence of the HLA-B27 type indicate in relation to ankylosing spondylitis?

<p>Predisposition to the disease (A)</p> Signup and view all the answers

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