And Answers Latest Updates
Which cytokine has some anti-inflammatory effects?
A. Interleukin-1 (IL-1)
B. Interleukin-10 (IL-10)
C. Tumor necrosis factor alpha (TNF-alpha)
D. None of the above; all cytokines have pro-inflammatory effects ANS B. Interleukin-10 (IL-10)
B lymphocytes provide humoral immunity through which process?
A. Direct cell lysis
B. Initiating an inflammatory response
C. Production of antibodies
D. Secretion of perforins ANS C. Production of antibodies
Which characteristic of the adaptive immune response is different from the innate immune response?
A. Reacts to microorganisms
B. Is faster
C. Recognizes specific antigens
D. Has no memory ANS C. Recognizes specific antigens
Which cells have CD8 receptors?
A. B lymphocytes
B. T helper cells type 1
C. T helper cells type 2
D. Cytotoxic T cells ANS D. Cytotoxic T cells
, Major histocompatibility class I (MHC I) proteins are located on which cells?
A. Red blood cells
B. B lymphocytes, dendritic cells, and macrophages only
C. All cells except for non-nucleated ones, such as red blood cells
D. Liver cells ANS C. All cells except for non-nucleated ones, such as red blood cells
What is the difference between monocytes and macrophages?
A. Monocytes are found in tissues, but macrophages circulate in the blood.
B. Monocytes circulate in the blood, but macrophages are found in tissues.
C. Monocytes are phagocytic, but macrophages are not.
D. Monocytes release perforins, but macrophages are phagocytic. ANS B. Monocytes circulate in the
blood, but macrophages are found in tissues.
What causes dell-mediated immunity to begins to decrease at puberty?
A. Decreased bone marrow production of T cells
B. Atrophy of the thymus
C. Diminishing effectiveness of most childhood vaccines
D. Excitatory effects of sex hormones on T cell function ANS B. Atrophy of the thymus
Which process confers long-lasting immunity against a specific organism?
A. Production of memory cells
B. Activation of macrophages
C. Activation of T cytotoxic cells
D. Production of inflammatory mediators ANS A. Production of memory cells