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Questions and Answers

Which type of immunity are Natural Killer cells important in?

  • Innate immunity (correct)
  • Adaptive immunity
  • Both innate and adaptive immunity
  • None of the above
  • How do Natural Killer cells distinguish between healthy and infected cells?

  • By identifying cell surface proteins induced by stress, malignant transformation, or microbial infections (correct)
  • By identifying class I MHC cell surface molecules
  • By size
  • By identifying intracellular pathogens
  • Which of the following is true about B cells?

  • They originate from stem cells in the thymus
  • They migrate to the liver
  • They differentiate into T cells
  • They produce antibodies (correct)
  • Where do B cells mature?

    <p>In the bone marrow</p> Signup and view all the answers

    What is a function of B cells?

    <p>They present antigens to T cells</p> Signup and view all the answers

    Which cells originate from stem cells in the bone marrow but mature in the thymus?

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

    Which cells express CD4 and recognize MHC II?

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

    Which cells are the primary target of HIV?

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

    Which cells produce large amounts of antibody specific to a particular antigen?

    <p>B cells</p> Signup and view all the answers

    How are plasma cells characterized?

    <p>Rough endoplasmic reticulum (RER) and eccentric nucleus</p> Signup and view all the answers

    Where are plasma cells typically found?

    <p>Bone marrow</p> Signup and view all the answers

    During which stage of fetal development does erythropoiesis occur in the bone marrow?

    <p>18 weeks to adulthood</p> Signup and view all the answers

    Which organ is responsible for synthesizing blood cells during fetal development?

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

    At what stage of fetal development does erythropoiesis occur in the spleen?

    <p>10 to 28 weeks</p> Signup and view all the answers

    Which type of hemoglobin has a higher affinity for oxygen due to its weaker binding of 2,3-BPG?

    <p>Fetal hemoglobin</p> Signup and view all the answers

    During the transition from fetal to adult hemoglobin, there is a switch from which type of chains to which type of chains?

    <p>γ chains to β chains</p> Signup and view all the answers

    Which of the following is a form of adult hemoglobin present in small amounts?

    <p>HbA2</p> Signup and view all the answers

    Which type of hemoglobin is composed of α2β2 chains?

    <p>HbA1</p> Signup and view all the answers

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