Hypersensitivity Reactions and Immune System Quiz
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Questions and Answers

Which type of hypersensitivity reaction is a cell-mediated response?

  • Type I
  • Type III
  • Type IV (correct)
  • Type II
  • What is the main characteristic of IgE antibodies?

  • They are classified based on the Gell and Coombs system
  • They cause severe liver damage
  • They are formed in response to antigenic material
  • They attach to the surface of mast cells (correct)
  • What is the term used to describe the undesirable effect of the immune response damaging tissues?

  • Immunity
  • Hypersensitivity (correct)
  • Antigenic material
  • Hepatitis C infection
  • Which immunologists devised the Gell and Coombs system for classifying hypersensitivity reactions?

    <p>Gell and Coombs</p> Signup and view all the answers

    What is the main cause of hypersensitivity reactions?

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

    Which type of hypersensitivity reaction involves antibodies formed in response to antigenic material?

    <p>Type I</p> Signup and view all the answers

    What is the term used to describe the severe liver damage in hepatitis C infection mediated by immune T cells?

    <p>Bystander effect</p> Signup and view all the answers

    What is the main characteristic of Type I hypersensitivity reactions?

    <p>They involve antibodies formed in response to antigenic material</p> Signup and view all the answers

    Which cells release preformed cytoplasmic granules filled with histamine, proteases, and cytokines in response to cross linking of IgE molecules by antigen binding?

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

    What are the mediators released from mast cells and eosinophils that result in an acute asthma attack?

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

    What is the process called when an individual becomes allergic to specific antigens and develops localized IgE-mediated reactions?

    <p>Atopic allergy</p> Signup and view all the answers

    Which type of immune response is protective against developing asthma?

    <p>Th1 immune response</p> Signup and view all the answers

    What is the term used to describe a severe generalized IgE-mediated hypersensitivity reaction that may be life-threatening?

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

    What triggers anaphylaxis in a susceptible person after initial sensitization?

    <p>Exposure to an allergen</p> Signup and view all the answers

    What type of immune response is associated with the hygiene hypothesis, which suggests early exposure to environmental allergens may protect against asthma?

    <p>Th1 immune response</p> Signup and view all the answers

    What is the method of treatment called that involves immunizing an allergic individual to the offending allergen by repeated subcutaneous injections of the antigen?

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

    Which of the following is true about an anaphylactoid reaction?

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

    What is the treatment for an anaphylactic reaction?

    <p>Epinephrine and other appropriate agents.</p> Signup and view all the answers

    What can trigger an anaphylactoid reaction?

    <p>Aspirin.</p> Signup and view all the answers

    What is scombroid poisoning?

    <p>A reaction caused by histamine in fish flesh.</p> Signup and view all the answers

    What happens when histamine is ingested in scombroid poisoning?

    <p>It triggers an anaphylactoid reaction.</p> Signup and view all the answers

    What is the cause of an anaphylactoid reaction?

    <p>Direct action on mast cells.</p> Signup and view all the answers

    Which of the following can trigger an anaphylactoid reaction?

    <p>Antibiotics.</p> Signup and view all the answers

    What is the similarity between an anaphylactic reaction and an anaphylactoid reaction?

    <p>Both can produce severe reactions.</p> Signup and view all the answers

    What is the difference between an anaphylactic reaction and an anaphylactoid reaction?

    <p>The cause.</p> Signup and view all the answers

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