Immune System and Lymphatic System Overview
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Questions and Answers

What is the primary function of lymph nodes?

  • To produce lymphocytes and plasma cells
  • To provide a site for rapid division of B cells
  • To facilitate the entry of blood cells directly into tissues
  • To filter the blood and remove debris and pathogens (correct)

What is the difference between lymphoid nodules and lymph nodes?

  • Lymphoid nodules are found in the respiratory and digestive tracts, while lymph nodes are found throughout the body (correct)
  • Lymphoid nodules are sites for rapid division of B cells and plasma cells, while lymph nodes are not
  • Lymphoid nodules have a fibrous capsule, while lymph nodes do not
  • Lymphoid nodules are more vascularized than lymph nodes

What is the role of the spleen in the lymphatic system?

  • The spleen filters the blood and removes debris and pathogens (correct)
  • The spleen is the site of rapid division of B cells and plasma cells
  • The spleen is the entry point for afferent lymphatic vessels
  • The spleen does not play a significant role in the lymphatic system

What is the function of mucosa-associated lymphoid tissue (MALT)?

<p>MALT is involved in developing immunity to oral pathogens (A)</p> Signup and view all the answers

Which of the following is NOT a characteristic of lymph nodes?

<p>Entry of blood cells directly into tissues (B)</p> Signup and view all the answers

What is the most serious inherited type of combined immunodeficiency disease (SCID)?

<p>It affects both T and B cells, and most patients die in the first year of life (D)</p> Signup and view all the answers

What is the primary mechanism by which HIV/AIDS wipes out the immune system?

<p>It infects and kills helper T cells, leading to a weakened immune response (D)</p> Signup and view all the answers

Which type of hypersensitivity reaction is characterized by the rapid release of histamine from mast cells?

<p>Type 1 hypersensitivity (C)</p> Signup and view all the answers

What is the primary cause of type 3 hypersensitivity reactions?

<p>Accumulation of antigen-antibody complexes along blood vessel linings (A)</p> Signup and view all the answers

What is the typical timeframe for the symptoms of a type 4 hypersensitivity reaction to develop?

<p>Within 24-72 hours (B)</p> Signup and view all the answers

What is the relationship between autoimmune diseases and the prevalence of infectious diseases in a population?

<p>Autoimmune diseases are more common in populations with lower rates of infectious diseases (A)</p> Signup and view all the answers

Which of the following is NOT a function of the lymphatic system?

<p>Pumping blood throughout the body (A)</p> Signup and view all the answers

What is the primary function of lymph nodes?

<p>Serving as a major staging area for the development of critical immune responses (A)</p> Signup and view all the answers

Which of the following statements about lymph vessels is correct?

<p>They are composed of simple squamous epithelial cells (C)</p> Signup and view all the answers

Which of the following is a function of T cells?

<p>Secreting chemokines to bring other immune cells to an area (D)</p> Signup and view all the answers

Which of the following is NOT a barrier defense in the immune system?

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

Where do B cells develop?

<p>Red bone marrow (D)</p> Signup and view all the answers

Which of the following is NOT a function of the innate immune system?

<p>Recognizing and responding to specific pathogens encountered before (C)</p> Signup and view all the answers

What is the primary role of neutrophils in the immune response?

<p>Acting as phagocytes and cooperating with lymphocytes (B)</p> Signup and view all the answers

What is the primary function of perforins and granzymes in the immune response?

<p>Inducing apoptosis in infected cells (B)</p> Signup and view all the answers

Which of the following is NOT a characteristic of chronic inflammation?

<p>A short-term response to injury (B)</p> Signup and view all the answers

What is the primary function of helper T cells (Th cells) in the immune response?

<p>Enhancing the immune response by secreting cytokines (A)</p> Signup and view all the answers

What is the primary function of regulatory T cells in the immune system?

<p>Suppressing other T cell immune responses (A)</p> Signup and view all the answers

Which of the following antibody classes is primarily involved in allergic reactions and anaphylaxis?

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

What is the primary difference between active and passive immunity?

<p>Active immunity is acquired through exposure to pathogens, while passive immunity involves the transfer of antibodies (D)</p> Signup and view all the answers

Which of the following is the primary mechanism by which viruses are fought by the immune system?

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

What is the primary role of seroconversion in the immune response?

<p>Monitoring the levels of antibodies and pathogens in the blood (D)</p> Signup and view all the answers

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