Pyrogens and Fever Induction
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Questions and Answers

What is the main function of plasma cells?

  • Produce and secrete antibodies (correct)
  • Activate the complement system
  • Provide immunological memory
  • Phagocytosis of pathogens
  • How are memory B cells described in the text?

  • Secrete large quantities of antibodies
  • Provide immunological memory (correct)
  • Short-lived lymphocytes
  • Derived from activated B cells
  • What differentiates plasma cells from memory B cells?

  • Production of antibodies (correct)
  • Persistence after immune response
  • Specialization in phagocytosis
  • Ability to neutralize pathogens
  • Which term refers to the activation and differentiation of B cells into plasma cells or memory B cells?

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

    What is the primary role of antibodies secreted by plasma cells?

    <p>Neutralize pathogens</p> Signup and view all the answers

    What do memory B cells provide after the resolution of an immune response?

    <p>Immunological memory</p> Signup and view all the answers

    What is immunocompetence?

    <p>The ability of lymphocytes to recognize and respond to specific antigens</p> Signup and view all the answers

    How do B cells and T cells acquire immunocompetence?

    <p>By rearranging their antigen receptor genes</p> Signup and view all the answers

    What is self-tolerance in the context of the immune system?

    <p>The ability to distinguish between self-antigens and foreign antigens</p> Signup and view all the answers

    Why are lymphocytes that recognize self-antigens eliminated or rendered tolerant?

    <p>To prevent autoimmune reactions</p> Signup and view all the answers

    What are naive lymphocytes?

    <p>Immature lymphocytes that have not yet encountered their specific antigen</p> Signup and view all the answers

    Where do naive B cells and T cells complete their maturation?

    <p>In the bone marrow (B cells) or thymus (T cells)</p> Signup and view all the answers

    What is the role of pyrogens in the body?

    <p>Inducing fever by acting on the hypothalamus</p> Signup and view all the answers

    Which type of pyrogen originates from external sources?

    <p>Exogenous pyrogens</p> Signup and view all the answers

    Which of the following is an example of an endogenous pyrogen?

    <p>Tumor necrosis factor-alpha (TNF-alpha)</p> Signup and view all the answers

    What is the main function of antibodies in humoral immunity?

    <p>Marking pathogens for destruction or neutralization</p> Signup and view all the answers

    Which type of immunity primarily targets extracellular pathogens and toxins?

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

    What triggers the release of endogenous pyrogens?

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

    What is the role of hepcidin in iron homeostasis?

    <p>Inducing internalization and degradation of ferroportin</p> Signup and view all the answers

    What happens to ferroportin when hepcidin levels are high?

    <p>It gets degraded and internalized</p> Signup and view all the answers

    Which protein is responsible for transporting iron throughout the body?

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

    What is the state of iron when bound to transferrin?

    <p>Ferric (Fe^3+)</p> Signup and view all the answers

    How does hepcidin affect iron fluxes into the bloodstream?

    <p>By limiting iron release from enterocytes and macrophages</p> Signup and view all the answers

    Which cell or organ requires transferrin for delivering iron?

    <p>Tissues and organs</p> Signup and view all the answers

    What is the characteristic feature of Multiple Sclerosis?

    <p>Muscle weakness</p> Signup and view all the answers

    Which organ system can be affected by allergic reactions?

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

    What causes hypersensitivities or allergic reactions?

    <p>Overreaction of the immune system to harmless substances</p> Signup and view all the answers

    Which of the following is an example of an allergic reaction?

    <p>Allergic rhinitis</p> Signup and view all the answers

    What can rapidly occur after exposure to an allergen and be potentially life-threatening?

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

    What does Multiple Sclerosis result in?

    <p>Impaired coordination</p> Signup and view all the answers

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