The Human Major Histocompatibility Complex (MHC) and Immune Responses Quiz

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Questions and Answers

Which of the following is true about the CD system used in immunophenotyping?

  • CD system is used to identify self vs. non-self cells
  • CD system is used to define cells based on their surface molecules (correct)
  • CD system is used to associate cells with certain immune functions
  • CD system is used to identify immune functions

What is the function of the thymus?

  • Activation of macrophages
  • Filtering of lymph nodes
  • Education of T-cells (correct)
  • Production of antibodies

What is the percentage of cellularity in the bone marrow at 10 years old?

  • 80% cellular
  • 90% cellular (correct)
  • 70% cellular
  • 60% cellular

Which type of T cells are the major regulators of the immune response and produce lymphokines?

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

Which type of T cells mediate the killing of cells, viruses, tumors, and transplants?

<p>Cytotoxic T cells (C)</p> Signup and view all the answers

Which type of cells are responsible for direct killing of viruses, tumors, and transplants?

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

Which type of cells produce cytokines and lymphokines to ensure a robust immune response?

<p>All of the above (D)</p> Signup and view all the answers

Which of the following is NOT a type of antigen?

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

Which of the following is the correct order of immunoglobulin abundance in plasma?

<p>IgG &gt; IgA &gt; IgM &gt; IgD &gt; IgE (D)</p> Signup and view all the answers

Which region of an antibody is responsible for binding to antigens?

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

What is the purpose of adjuvants in vaccines?

<p>To help or enhance vaccine efficacy (C)</p> Signup and view all the answers

Which of the following is true about Staphylococcus epidermidis?

<p>Most strains do not cause illness. (A)</p> Signup and view all the answers

What type of infections does Staphylococcus epidermidis commonly cause?

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

What is the term used to describe Staphylococcus epidermidis strains that are resistant to multiple antibiotics?

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

Which of the following is NOT a function of the thymus?

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

Which of the following is a characteristic of lymph nodes?

<p>They have a cortex with a lot of T lymphocytes (B)</p> Signup and view all the answers

What is the primary function of dendritic cells?

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

Which type of immunity is characterized by the production of antibodies?

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

Which chromosome is the Human Major Histocompatibility Complex Class II D region located on?

<p>Chromosome #6 (A)</p> Signup and view all the answers

What are the three major classes coded by the Human Major Histocompatibility Complex?

<p>Class I- A, B, C; Class II- DP, DQ, DR; Class III (D)</p> Signup and view all the answers

Which cells are responsible for processing and presenting antigens to T cells?

<p>Dendritic cells, B cells or macrophages (D)</p> Signup and view all the answers

What is the role of Antigen Presenting Cells (APCs) in T cell responses?

<p>APCs are key to the genesis of T cell responses (B)</p> Signup and view all the answers

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