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  • Question 1 - Humoral immunity is a major defence against: ...

    Correct

    • Humoral immunity is a major defence against:

      Your Answer: Viral infections

      Explanation:

      Humoral immunity is provided by the neutralizing and non-neutralizing antibodies that are formed from the B lymphocytes. This form of immunity is most important in viral infection. Non-neutralizing antibodies increases phagocytosis of the infected cell and inhibit the ability of the virus to replicate.

    • This question is part of the following fields:

      • Immunology
      • Medicine
      9.8
      Seconds

  • Question 2 - What is the name of the area that indicates the site of active...

    Correct

    • What is the name of the area that indicates the site of active B lymphocyte proliferation?

      Your Answer: Germinal centre

      Explanation:

      The cortex of the lymph node consists of the lymphoid nodules and sinusoids and posses a germinal centre from which B cells proliferate.

    • This question is part of the following fields:

      • Immunology
      • Medicine
      23.9
      Seconds

  • Question 3 - Arachidonic acid is converted to: ...

    Correct

    • Arachidonic acid is converted to:

      Your Answer: Prostaglandin H2

      Explanation:

      The enzymes cyclooxygenase-1 and -2 (i.e. prostaglandin G/H synthase 1 and 2 {PTGS1 and PTGS2}) metabolize arachidonic acid to Prostaglandin G2 and prostaglandin H2.

    • This question is part of the following fields:

      • Immunology
      • Medicine
      2.8
      Seconds

  • Question 4 - Which is the primary lymphoid organ? ...

    Correct

    • Which is the primary lymphoid organ?

      Your Answer: Thymus

      Explanation:

      Lymphoid organs consist of lymph nodes, the thymus, spleen and tonsils. The thymus is the primary lymphoid organ as it is the organ in which the T cells mature.

    • This question is part of the following fields:

      • Immunology
      • Medicine
      2.6
      Seconds

  • Question 5 - Which of the following cells release histamines when they are activated by binding...

    Correct

    • Which of the following cells release histamines when they are activated by binding of specific antigens to cell fixed IgE molecules?

      Your Answer: Basophils

      Explanation:

      Mast cells and basophils both contain granules of vasoactive histamine in their cytosol. Both of them express IgE receptors on their cell surface and upon binding with a specific antigen they release their cytokines including histamine.

    • This question is part of the following fields:

      • Immunology
      • Medicine
      4.1
      Seconds

  • Question 6 - HLA class III genes encode for ...

    Correct

    • HLA class III genes encode for

      Your Answer: Complement

      Explanation:

      HLAs corresponding to MHC class III encode components of the complement system.

    • This question is part of the following fields:

      • Immunology
      • Medicine
      2.2
      Seconds

  • Question 7 - Cells mediating innate immunity include: ...

    Correct

    • Cells mediating innate immunity include:

      Your Answer: Natural killer cells

      Explanation:

      Natural killer cells have features of both innate and adaptive immunity. They play an important part in defence against tumours and viruses. They are non specific and do not generate immunological memory

    • This question is part of the following fields:

      • Immunology
      • Medicine
      16.3
      Seconds

  • Question 8 - In both innate and humoral immunity, receptors involved recognize: ...

    Correct

    • In both innate and humoral immunity, receptors involved recognize:

      Your Answer: The shape of the antigen

      Explanation:

      Antigen receptors recognize the shape of the antigen. They identify specific epitopes and are found on T cells.

    • This question is part of the following fields:

      • Immunology
      • Medicine
      3.1
      Seconds

  • Question 9 - Which cells are considered the source of IL-3? ...

    Correct

    • Which cells are considered the source of IL-3?

      Your Answer: T lymphocytes

      Explanation:

      IL-3 stimulates haematopoiesis and is secreted mainly from the T lymphocytes.

    • This question is part of the following fields:

      • Immunology
      • Medicine
      2.9
      Seconds

  • Question 10 - What is the function of the acute phase protein, C-reactive protein? ...

    Correct

    • What is the function of the acute phase protein, C-reactive protein?

      Your Answer: Opsonises bacteria

      Explanation:

      There are various immune reactions that become activated once the barrier between the body and environment has been compromised. There are certain opsonins that bind to the bacteria and facilitate phagocytosis. One of them is the acute phase protein: C protein. others include antibodies and complement.

    • This question is part of the following fields:

      • Immunology
      • Medicine
      2.7
      Seconds

SESSION STATS - PERFORMANCE PER SPECIALTY

Immunology (10/10) 100%
Medicine (10/10) 100%
Passmed
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