46. When a a-lymphocyte contacts an antigen, it develops into __that releases __
ID: 14439 • Letter: 4
Question
46. When a a-lymphocyte contacts an antigen, it develops into __that releases ___a.plasma cells; antibody
b.killer cells; antibody
c.memory cells; antibody
d.none of the above
47. 'The formation of active T cells involves
a.bone marrow
b.thymus gland
c.both a and b
d.neither a nor b
48. Inflammatory responses includea. edema
b.increased capillary permeability
c.both a and b
d.neither a nor b
49. When invaded bacteria antigen contact a-lymphocytes, it induces
a.cellular immunity
b.humoral immunity
c.both a and b
d.neither a nor b
50. The activated T-Iymphocytes produces the daughter cells of
a.killer cells
b.helper cells
c.both a and b
d.neither a nor b
Explanation / Answer
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46. When a a-lymphocyte contacts an antigen, it develops into __that releases ___
c.memory cells; antibody
47. 'The formation of active T cells involves
c.both a and b
All T cells originate from haematopoietic stem cells in the bone marrow. Then, they migrate to the thymus for maturation to active T cells.
48. Inflammatory responses include
c.both a and b
49. When invaded bacteria antigen contact a-lymphocytes, it induces
b.humoral immunity
50. The activated T-Iymphocytes produces the daughter cells of
c.both a and b
Those are Thelper cells (TH1 and TH2) and Tcytotoxic cells (or natural killer cells).
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