Immune System Cells and Phagocytosis Quiz
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Questions and Answers

Which type of phagocytic cell is responsible for early phagocytosis during an infection, before antibodies are available?

  • Dendritic cells
  • Phagocytic monocytes (macrophages)
  • Polymorph nuclear leukocytes (PMNs)
  • Phagocytosis can occur in the absence of serum antibodies (correct)
  • What is an important function of the spleen?

  • Storing excess iron
  • Filtering microorganisms from the bloodstream (correct)
  • Producing antibodies
  • Producing red blood cells
  • What is the most common bacterial infection that patients without a functional spleen are susceptible to?

  • Escherichia coli
  • Salmonellae
  • Pneumococci (correct)
  • Staphylococcus aureus
  • Which of the following is NOT a type of phagocytic cell in the immune system?

    <p>Lymphocytes</p> Signup and view all the answers

    What is the main consequence of the bone marrow being suppressed, leading to a decrease in the number of functional granulocytes?

    <p>Increased susceptibility to opportunistic infection by bacteria</p> Signup and view all the answers

    Which of the following components is NOT found in granulocyte granules?

    <p>Antibodies</p> Signup and view all the answers

    Which of the following is the main function of phagocytic cells during infections?

    <p>Chemotaxis, migration, ingestion and microbial killing</p> Signup and view all the answers

    Which type of phagocytic cell is primarily responsible for clearing particulate matter from the lymph and bloodstream?

    <p>Mononuclear phagocytic cells</p> Signup and view all the answers

    What is the primary role of the spleen in the immune system?

    <p>Filtering the blood and removing old/damaged red blood cells</p> Signup and view all the answers

    Which type of phagocytic cell is the first to respond to a bacterial infection, and is crucial for the initial clearance of the pathogen?

    <p>Neutrophils</p> Signup and view all the answers

    Which type of phagocytic cell is responsible for the production of inflammatory mediators, such as leukotrienes and prostaglandins, during an immune response?

    <p>Eosinophils</p> Signup and view all the answers

    Which of the following is a characteristic of the innate immune system's pattern recognition receptors (PRRs)?

    <p>They recognize pathogen-associated molecular patterns (PAMPs)</p> Signup and view all the answers

    What is the main function of opsonins in phagocytosis?

    <p>Facilitate ingestion by phagocytes</p> Signup and view all the answers

    Which type of immune cell is primarily responsible for the process known as degranulation?

    <p>Granulocytes</p> Signup and view all the answers

    What factor contributes to the inhibition of phagocytic mechanisms in the pathogenesis of legionella pneumonia?

    <p>Prevention of degranulation</p> Signup and view all the answers

    How do activated macrophages contribute to inflammation?

    <p>Produce and release interleukin-1</p> Signup and view all the answers

    Which immune cell is derived from monocyte stem cells in the bone marrow?

    <p>Macrophages</p> Signup and view all the answers

    What is the primary effect of ingestion of foreign particles on phagocytic granulocytes?

    <p>Formation of phagolysosome</p> Signup and view all the answers

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