Immune System Quiz
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Questions and Answers

Innate immunity is a defense system that operates in all animals and includes barrier defenses, specialized cells, and chemical ______.

defenses

What is the function of B cells in the immune system?

  • To recognize specific parts of specific molecules on the surface of specific pathogens
  • To produce memory cells
  • To target pathogens circulating in body fluids (correct)
  • To destroy pathogens hiding within body cells
  • B cells destroy pathogens circulating in ______ fluids while T cells target pathogens hiding within body cells. (body)

    True or false: B cells and T cells recognize specific parts of non-specific molecules on the surface of specific pathogens.

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

    What are lymphocytes?

    <p>Cells of the adaptive immune system</p> Signup and view all the answers

    What are the two types of immune system?

    <p>Innate and adaptive immunity</p> Signup and view all the answers

    True or false: Adaptive immunity is a defense system that operates in all animals.

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

    The proliferation phase is called ______ selection. (clonal)

    Signup and view all the answers

    What do B and T cells recognize?

    <p>Specific parts of specific molecules on the surface of specific pathogens</p> Signup and view all the answers

    What is the difference between B cell and T cell antigen receptors?

    <p>B cell receptors are Y-shaped and composed of 4 polypeptides, while T cell receptors are stick-like and composed of just two polypeptides.</p> Signup and view all the answers

    Which defense system is exclusive to vertebrates?

    <p>Adaptive immunity</p> Signup and view all the answers

    The immune system can be split into innate and adaptive ______.

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

    True or false: Invertebrates have innate defenses that include barrier defenses, specialized cells, and chemical defenses.

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

    True or false: B cell antigen receptors are stick-like and composed of just two polypeptides, while T cell antigen receptors are Y-shaped and composed of 4 polypeptides.

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

    The benefits of memory cells is a rapid response upon ______. (re-infection)

    Signup and view all the answers

    What is the difference between B cell and T cell antigen receptors?

    <p>B cell receptors are Y-shaped and composed of 4 polypeptides, while T cell receptors are stick-like and composed of just two polypeptides</p> Signup and view all the answers

    True or false: B cells target pathogens hiding within body cells, while T cells destroy pathogens circulating in body fluids.

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

    What is the purpose of the proliferation phase in the immune response?

    <p>To produce effector cells and memory cells</p> Signup and view all the answers

    True or false: Mammals do not have an elaborate network of lymph vessels.

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

    Invertebrates have innate defenses that include barrier defenses, specialized cells, and chemical ______.

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

    What are the three types of lymphocytes?

    <p>B cells, T cells, and dendritic cells</p> Signup and view all the answers

    True or false: Toll-like receptors (TLRs) are found inside phagocytic cells.

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

    What is the function of B cells?

    <p>To destroy pathogens circulating in body fluids</p> Signup and view all the answers

    Adaptive immunity is a defense system exclusive to vertebrates and includes B cells, T cells, and ______.

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

    Which cells are the effector cells of activated B cells?

    <p>Plasma cells</p> Signup and view all the answers

    What is the function of Toll-like receptors (TLRs)?

    <p>To recognize and bind to pathogens</p> Signup and view all the answers

    An initial encounter to a novel antigen takes roughly ______ days for B and T cell activation, while upon a second encounter, the response time is just a few short days. (14)

    Signup and view all the answers

    True or false: The proliferation phase of B cells and T cells is called clonal expansion.

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

    Which type of immune system defense system operates in all animals?

    <p>Innate immunity</p> Signup and view all the answers

    True or false: The proliferation stage of B cells and T cells produces three types of cells: effector cells, memory cells, and regulatory cells.

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

    True or false: White blood cells include only neutrophils and lymphocytes.

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

    Plasma cells are the effector cells of activated B cells, while cytotoxic T cells are the effector cells of activated ______ T cells. (helper)

    Signup and view all the answers

    Mammals have an elaborate network of lymph vessels, primary and secondary tissues of the immune system, and barrier ______.

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

    What is the name of the proliferation phase?

    <p>Clonal selection</p> Signup and view all the answers

    What is the role of memory cells in the immune response?

    <p>To provide a rapid response upon re-infection</p> Signup and view all the answers

    B cell antigen receptors are Y-shaped and composed of 4 polypeptides, while T cell antigen receptors are stick-like and composed of just two ______. (polypeptides)

    Signup and view all the answers

    What are the two types of cells produced during the proliferation stage of B and T cells?

    <p>Memory cells and effector cells</p> Signup and view all the answers

    What is the function of dendritic cells?

    <p>To link innate and adaptive immunity</p> Signup and view all the answers

    True or false: Plasma cells are the effector cells of activated T cells, while cytotoxic T cells are the effector cells of activated B cells.

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

    How long does it take for B and T cell activation upon an initial encounter to a novel antigen?

    <p>Roughly 14 days</p> Signup and view all the answers

    Pathogens are recognized by Toll-like receptors (TLRs) on the ______ of phagocytic cells.

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

    True or false: Dendritic cells function like macrophages and are the link between innate and adaptive immunity.

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

    Which cells target pathogens hiding within body cells?

    <p>T cells</p> Signup and view all the answers

    What are plasma cells?

    <p>The effector cells of activated B cells</p> Signup and view all the answers

    True or false: Natural killer cells release molecules that destroy bacteria.

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

    True or false: Memory cells continue to circulate in high concentrations in the blood until the pathogen is encountered again.

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

    Lymphocytes are cells of the ______ immune system. (adaptive)

    Signup and view all the answers

    White blood cells include neutrophils, monocytes, basophils, eosinophils, and ______.

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

    Which white blood cell releases molecules that destroy virus-infected or cancer cells?

    <p>Natural killer cells</p> Signup and view all the answers

    The proliferation stage of B cells and T cells produces two types of cells: effector cells and ______ cells. (memory)

    Signup and view all the answers

    What are the protein-based chemical defenses?

    <p>Antimicrobial peptides, interferons, and the complement system</p> Signup and view all the answers

    True or false: Antimicrobial peptides, interferons, and the complement system are all chemical defenses that are protein-based.

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

    Dendritic cells function like macrophages and are the link between innate and ______ immunity.

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

    What are memory cells?

    <p>Cells that continue to circulate in low concentrations in the blood until the pathogen is encountered again</p> Signup and view all the answers

    What is the function of cytotoxic T cells in the immune system?

    <p>To target pathogens hiding within body cells</p> Signup and view all the answers

    True or false: The benefits of memory cells is a slower response upon re-infection.

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

    True or false: An initial encounter to a novel antigen takes roughly 7 days for B and T cell activation, while upon a second encounter, the response time is just a few short days.

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

    Natural killer cells release molecules that destroy virus-infected or ______ cells.

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

    What is the name of the phase in which B and T cells undergo clonal selection?

    <p>Proliferation phase</p> Signup and view all the answers

    True or false: Innate immunity is a defense system exclusive to vertebrates.

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

    What is the benefit of memory cells?

    <p>A rapid response upon re-infection</p> Signup and view all the answers

    What is the main function of innate immunity?

    <p>To provide immediate defense against pathogens</p> Signup and view all the answers

    Memory cells continue to circulate in low concentrations in the ______ until the pathogen is encountered again. (blood)

    Signup and view all the answers

    Antimicrobial peptides, interferons, and the complement system are protein-based chemical ______.

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

    How long does it take for B and T cell activation upon an initial encounter to a novel antigen?

    <p>A few weeks</p> Signup and view all the answers

    B cells and T cells recognize specific parts of specific molecules on the surface of specific ______. (pathogens)

    Signup and view all the answers

    True or false: B cells and T cells are cells of the innate immune system.

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

    How long do memory cells continue to circulate in the blood?

    <p>Several months</p> Signup and view all the answers

    True or false: The immune system targets and destroys healthy cells in the body.

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

    What is the name of the network of lymph vessels and tissues in mammals?

    <p>Lymphatic system</p> Signup and view all the answers

    Study Notes

    • The immune system targets and destroys pathogens that cause disease.
    • The immune system can be split into innate and adaptive immunity.
    • Innate immunity is a defense system that operates in all animals and includes barrier defenses, specialized cells, and chemical defenses.
    • Adaptive immunity is a defense system exclusive to vertebrates and includes B cells, T cells, and lymphocytes.
    • Invertebrates have innate defenses that include barrier defenses, specialized cells, and chemical defenses.
    • Mammals have an elaborate network of lymph vessels, primary and secondary tissues of the immune system, and barrier defenses.
    • Pathogens are recognized by Toll-like receptors (TLRs) on the surface of phagocytic cells.
    • White blood cells include neutrophils, monocytes, basophils, eosinophils, and lymphocytes.
    • Dendritic cells function like macrophages and are the link between innate and adaptive immunity.
    • Natural killer cells release molecules that destroy virus-infected or cancer cells.
    • Antimicrobial peptides, interferons, and the complement system are protein-based chemical defenses.

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    Description

    Test your knowledge on the fascinating world of the immune system with this quiz! From innate and adaptive immunity to the various types of white blood cells and chemical defenses, this quiz covers it all. Use your understanding of key terms like dendritic cells, Toll-like receptors, and natural killer cells to answer questions about how the immune system functions and protects us from pathogens. See how much you really know about this complex and essential part of our bodies!

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