Microbiology and Immunity
18 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which type of toxin is produced by gram-negative bacteria and is composed of lipopolysaccharides?

  • Superantigen
  • Cytotoxin
  • Exotoxin
  • Endotoxin (correct)

    • What is the first line of defense against pathogens in the immune system?

  • Inflammation response
  • Physical barriers (correct)
  • Phagocytosis
  • Antimicrobial factors

    • Which immune cells play a key role in the inflammation response by releasing histamine?

  • Dendritic cells
  • Mast cells (correct)
  • Macrophages
  • Neutrophils

    • What is the primary function of the complement system in the immune response?

    <p>Recognizing and eliminating pathogens</p> Signup and view all the answers

    Which type of immunity involves the activation of immune cells, such as T cells and B cells, in response to specific antigens?

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

    What is the primary function of memory cells in the adaptive immune response?

    <p>Providing long-term immunity</p> Signup and view all the answers

    What is the primary function of Antigen Presenting Cells (APCs)?

    <p>To present antigens to T cells and initiate an immune response</p> Signup and view all the answers

    What is the role of MHC-2 proteins in the immune system?

    <p>To present antigens to CD4+ T cells</p> Signup and view all the answers

    What is the primary mechanism of action of cytotoxic T cells?

    <p>To recognize and eliminate infected cells using perforin and granzyme</p> Signup and view all the answers

    What is the role of interleukins in the immune system?

    <p>To coordinate the immune response by communicating between immune cells</p> Signup and view all the answers

    What is the primary function of natural killer cells?

    <p>To recognize and eliminate infected cells</p> Signup and view all the answers

    What was the primary method used by the Chinese to prevent smallpox in the early 1400’s?

    <p>Inoculation with a mild form of the virus</p> Signup and view all the answers

    What is a primary purpose of Koch's postulates?

    <p>To determine the causality of a disease</p> Signup and view all the answers

    What is a fomite?

    <p>An inanimate object that can carry pathogens</p> Signup and view all the answers

    What is the primary mechanism by which pathogens like Staphylococcus aureus avoid host defenses?

    <p>By producing capsules that prevent phagocytosis</p> Signup and view all the answers

    What is the primary reason why healthcare facilities are susceptible to healthcare-associated infections (HAIs)?

    <p>Because of the use of invasive medical devices</p> Signup and view all the answers

    What is the primary function of IgA protease in pathogens?

    <p>To evade the host's immune system by degrading immunoglobulins</p> Signup and view all the answers

    What is the primary mechanism of adherence used by pathogens like Streptococcus pyogenes?

    <p>By producing M protein that binds to host cells</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser