Innate Immune Defenses in the Body
29 Questions
0 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

What characterizes the steady state (plateau) phase of antibody production?

  • Gradual decline in antibody levels
  • Shortened lag period
  • Rapid increase in antibody levels
  • Constant antibody levels (correct)

    • What is the main characteristic of the exponential phase of antibody production?

  • Constant antibody levels
  • Shortened lag period
  • Rapid increase in antibody levels (correct)
  • Gradual decline in antibody levels

    • Why does the antibody level gradually decline during the B-declining phase?

  • Decreased production of plasma cells (correct)
  • Rapid antigen entry
  • Constant secretion and degradation of antibodies
  • Increased production of new plasma cells

    • What is the term used for immune responses induced by a similar antigen during subsequent encounters?

    <p>Secondary immune responses</p> Signup and view all the answers

    Why does the lag period shorten during secondary immune responses?

    <p>Memory response from previous exposure</p> Signup and view all the answers

    What effect do secondary immune responses have on eliminating antigens?

    <p>Immediate elimination</p> Signup and view all the answers

    What role do sweat glands play in the body's defense against infections?

    <p>Secretion of sweat washes infections off due to high salt content</p> Signup and view all the answers

    Which of the following contains anti-bacterial properties due to lysozymes?

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

    What is the function of gut flora in preventing infections?

    <p>Secrete toxic substances to kill pathogens</p> Signup and view all the answers

    How do phagocytic white blood cells contribute to defense against infections?

    <p>Engulf and digest pathogens</p> Signup and view all the answers

    What is the role of specific immunity (Adaptive Immunity) in combating infections?

    <p>Involves production of antibodies against specific antigens</p> Signup and view all the answers

    How does mucus contribute to the body's defense system?

    <p>Traps infectious agents</p> Signup and view all the answers

    What distinguishes Specific Immunity from Non-specific Immunity?

    <p>Specific immunity is effective against all invaders, while non-specific immunity is a highly focused response.</p> Signup and view all the answers

    Which type of immunity does not form a defensive memory?

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

    What is the main function of the complement system in the immune system?

    <p>To attack pathogens and kill cells</p> Signup and view all the answers

    When does a primary immune response occur?

    <p>When an antigen enters the body for the first time.</p> Signup and view all the answers

    How are the proteins of the complement system usually found in the blood?

    <p>Inactive precursors</p> Signup and view all the answers

    Which organ is primarily responsible for synthesizing the proteins of the complement system?

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

    What characterizes the lag phase in primary immune responses?

    <p>It is the period when T cells and B cells are activated by immunogens.</p> Signup and view all the answers

    What happens when an antigen associates with one of the complement proteins?

    <p>It turns the protein into an effective form for attacking pathogens</p> Signup and view all the answers

    Which cells are involved in non-specific immunity?

    <p>Macrophages and T cells</p> Signup and view all the answers

    What is the final compound formed by the series of reactions in the complement system?

    <p>Membrane attack complex (C5-C9)</p> Signup and view all the answers

    What distinguishes naturally acquired immunity from artificially acquired immunity?

    <p>Naturally acquired immunity occurs without intentional intervention, while artificially acquired immunity results from vaccination.</p> Signup and view all the answers

    What is the main difference between primary and secondary immune responses?

    <p>The lag phase is shorter in the secondary response.</p> Signup and view all the answers

    Which type of immunity involves the activation of phagocytes and cytotoxic T-lymphocytes?

    <p>Cell-mediated immunity</p> Signup and view all the answers

    What is the protective function of immunization in humoral immunity?

    <p>Function in the humor (fluid or serum)</p> Signup and view all the answers

    Which type of cells does cell-mediated immunity primarily target?

    <p>Virus-infected cells</p> Signup and view all the answers

    What is the main function of cell-mediated immunity in defending against infections?

    <p>Activating macrophages</p> Signup and view all the answers

    Which type of infection is cell-mediated immunity particularly effective against?

    <p>Virus-infected cells</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser