Immunology Chapter: Host Reaction to Foreign Substances
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Questions and Answers

What is the primary function of the immune system in defending the body against infection?

  • To maintain the skin at pH of 5.6
  • To produce earwax
  • To recognize and respond to foreign antigen (correct)
  • To attack normal cells

What is the result of the body's natural defense system failing to distinguish between self and non-self cells?

  • Autoimmune disease (correct)
  • Hypersensitivity reaction
  • Innate immunity
  • Adaptive immunity

Which type of white blood cell is primarily involved in combating parasitic infections?

  • Neutrophils
  • Eosinophils (correct)
  • Basophils
  • Monocytes

What is the primary function of the external defense system in immunology?

<p>To provide a physical barrier against infection (C)</p> Signup and view all the answers

Which of the following is NOT a characteristic of innate immunity?

<p>Requires prior exposure to an antigen (A)</p> Signup and view all the answers

What is the role of lysosomes in the internal defense system?

<p>To attack cell walls of microorganisms (A)</p> Signup and view all the answers

Which of the following types of cells is responsible for phagocytosis in the nervous system?

<p>Microglia (B)</p> Signup and view all the answers

What is the primary function of antibodies in the immune response?

<p>To activate complements for phagocytosis (B)</p> Signup and view all the answers

Which immunoglobulin is the predominant antibody in secondary or anamnestic immune responses?

<p>IgG (A)</p> Signup and view all the answers

What is the primary function of IgD?

<p>To differentiate into T and B cells (A)</p> Signup and view all the answers

Which of the following cells is responsible for phagocytosis in the liver?

<p>Kupffer cells (D)</p> Signup and view all the answers

What is the function of IgM?

<p>To respond to primary infection (C)</p> Signup and view all the answers

What is the primary function of Protein A in Staphylococcus aureus?

<p>Preventing compliment activation in phagocytosis (B)</p> Signup and view all the answers

What is the primary habitat of Escherichia coli?

<p>Large intestines (A)</p> Signup and view all the answers

What is the function of Staphylokinase in Staphylococcus aureus?

<p>Dissolving fibrin clots (D)</p> Signup and view all the answers

What is the primary mode of transmission of MRSA in a community setting?

<p>Direct contact with an infected person (A)</p> Signup and view all the answers

What is the primary reason for the emergence of MRSA?

<p>Overuse of antibiotics (D)</p> Signup and view all the answers

What is the function of Coagulase in Staphylococcus aureus?

<p>Promoting the formation of fibrin layer (C)</p> Signup and view all the answers

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