27 Questions
Which division of the immune system is inborn, non-specific, and does not have memory?
Innate immunity
What is the first line of defense in the innate immune response that includes mechanical and chemical barriers?
Mechanical barriers
Which of the following is a humoral (soluble) component in the second line of the innate immune response?
Complement
What is the process of engulfing bacteria after entering blood or tissue fluid in the immune system known as?
Phagocytosis
Which component creates an acidic pH in the adult female vaginal, serving as a biological barrier in the immune system?
Lactobacilli
Which division of the immune system is acquired, specific, and has delayed memory?
Adaptive immunity
Which type of immune response is mediated by antibodies secreted by B lymphocytes?
Humoral immune response
Which type of antigen includes substances like bacterial cell wall and viral particles?
Viral, fungal, and parasitic antigen
Which class of immunoglobulins constitutes approximately 75% of all immunoglobulins?
IgG
Which type of immune response is mediated by T-lymphocytes and eliminates intracellular microbes like viruses?
T-cytotoxic cell response
Which class of immunoglobulins is mainly involved in primary immune responses?
IgM
Which type of antigen includes substances like portions of milk and blood groups?
Human antigen
Which enzyme produced by Staphylococcus aureus causes the lysis of erythrocytes?
Coagulase enzyme
What is the characteristic appearance of Staphylococcus aureus colonies on mannitol salt agar?
Golden yellow
In which type of infections does Staphylococcus aureus commonly cause abscesses and boils?
Pyogenic infections
What is the morphology of Staphylococcus aureus?
Gram-positive spherical cocci
Which agar shows beta hemolysis when Staphylococcus aureus is cultured?
Blood agar
Which virulence factor of Staph. aureus causes food poisoning?
Enterotoxin
What is the classification of streptococci based on the type of hemolysis on blood agar?
Beta hemolytic streptococci
Which virulence factor of Streptococcus pyogenes protects bacteria against phagocytosis?
M protein
Which disease is caused by Streptococcus pyogenes and presents as cellulitis infection of the deep layer of the skin?
Erysipelas
What is the laboratory specimen used for the diagnosis of Neisseria infections?
Throat swabs
Which type of streptococci exhibits complete hemolysis (clear zone) on blood agar?
Beta hemolytic streptococci
Which enzyme produced by Streptococcus pyogenes is used in the treatment of pulmonary emboli?
Streptokinase
What is the morphology of Neisseria bacteria?
Gram negative cocci
What is the characteristic cultural feature of Streptococcus pyogenes on blood agar?
Beta hemolysis ( clear zone )
What is the function of Streptolysin produced by Streptococcus pyogenes?
Hemolysis
This quiz provides an overview of Chapter 6 in Immunology, covering the study of the immune system, its components, and the concept of immunity. It touches on both innate and adaptive immunity, and their respective roles in protecting the body from invading microorganisms and foreign substances.
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