Immunology: Chapter 6 Overview
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Questions and Answers

Which division of the immune system is inborn, non-specific, and does not have memory?

  • Adaptive immunity
  • Innate immunity (correct)
  • Humoral immunity
  • Cellular immunity
  • What is the first line of defense in the innate immune response that includes mechanical and chemical barriers?

  • Interferon
  • Humoral components
  • Mechanical barriers (correct)
  • Phagocytosis
  • Which of the following is a humoral (soluble) component in the second line of the innate immune response?

  • C-reactive protein (CRP)
  • Complement (correct)
  • Lysozyme
  • Interferon
  • What is the process of engulfing bacteria after entering blood or tissue fluid in the immune system known as?

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

    Which component creates an acidic pH in the adult female vaginal, serving as a biological barrier in the immune system?

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

    Which division of the immune system is acquired, specific, and has delayed memory?

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

    Which type of immune response is mediated by antibodies secreted by B lymphocytes?

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

    Which type of antigen includes substances like bacterial cell wall and viral particles?

    <p>Viral, fungal, and parasitic antigen</p> Signup and view all the answers

    Which class of immunoglobulins constitutes approximately 75% of all immunoglobulins?

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

    Which type of immune response is mediated by T-lymphocytes and eliminates intracellular microbes like viruses?

    <p>T-cytotoxic cell response</p> Signup and view all the answers

    Which class of immunoglobulins is mainly involved in primary immune responses?

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

    Which type of antigen includes substances like portions of milk and blood groups?

    <p>Human antigen</p> Signup and view all the answers

    Which enzyme produced by Staphylococcus aureus causes the lysis of erythrocytes?

    <p>Coagulase enzyme</p> Signup and view all the answers

    What is the characteristic appearance of Staphylococcus aureus colonies on mannitol salt agar?

    <p>Golden yellow</p> Signup and view all the answers

    In which type of infections does Staphylococcus aureus commonly cause abscesses and boils?

    <p>Pyogenic infections</p> Signup and view all the answers

    What is the morphology of Staphylococcus aureus?

    <p>Gram-positive spherical cocci</p> Signup and view all the answers

    Which agar shows beta hemolysis when Staphylococcus aureus is cultured?

    <p>Blood agar</p> Signup and view all the answers

    Which virulence factor of Staph. aureus causes food poisoning?

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

    What is the classification of streptococci based on the type of hemolysis on blood agar?

    <p>Beta hemolytic streptococci</p> Signup and view all the answers

    Which virulence factor of Streptococcus pyogenes protects bacteria against phagocytosis?

    <p>M protein</p> Signup and view all the answers

    Which disease is caused by Streptococcus pyogenes and presents as cellulitis infection of the deep layer of the skin?

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

    What is the laboratory specimen used for the diagnosis of Neisseria infections?

    <p>Throat swabs</p> Signup and view all the answers

    Which type of streptococci exhibits complete hemolysis (clear zone) on blood agar?

    <p>Beta hemolytic streptococci</p> Signup and view all the answers

    Which enzyme produced by Streptococcus pyogenes is used in the treatment of pulmonary emboli?

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

    What is the morphology of Neisseria bacteria?

    <p>Gram negative cocci</p> Signup and view all the answers

    What is the characteristic cultural feature of Streptococcus pyogenes on blood agar?

    <p>Beta hemolysis ( clear zone )</p> Signup and view all the answers

    What is the function of Streptolysin produced by Streptococcus pyogenes?

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

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