5-43. Common cell that gives rise to all types of blood cells:
b. stem cell++
5-44. What blood cells are formed in the thymus:
b. T-lymphocytes++
5-45. At what age does liver carry out hemopoietic function:
c. embryonal++
5-46. Formed elements of blood were separated from plasma with the help of centrifugation, and then they were injected into culture medium. What cells can be formed in the colony:
a. stem cells++
5-47. What process occurs in the cytoplasm of erythrocytes during erythropoiesis:
a. accumulation of hemoglobin+++
5-48. Effector cells of the humoral immunity are:
c. plasmocytes++
5-49. Effector cells of the cellular immunity are:
d. T-lymphocytes-killers +++
5-50. Cells that play a major role in both cellular and humoral immunity:
c. lymophocytes, macrophages, plasmocytes++
5-51. In the postnatal life erythrocytes are formed in:
c. red bone marrow++
5-52. What structures are formed in the red bone marrow:
e. thrombocytes, erythrocytes, granulocytes, B-lymphocytes, monocytes, precursor-cells of T-lymphocytes ++
5-53. What cells are characterized by the ability for unlimited self-reproduction:
a. stem (founder) cells++
5-54. What blood cells are formed in the wall of the yolk sac and of other extraembryonic organs:
c. primary erythrocytes, secondary erythrocytes primitive granulocytes++
5-55. In the intrauterine life, the intravascular formation of blood cells occurs in:
e. yolk sac+
5-56. At what stage of the enbryonal development does hemapoiesis in the liver begin:
d. in the fifth week++
5-57. At what stage of the embryonal development does hematopoiesis in the spleen begin:
d. in the third month++
5-58. At what stage of the embryonal development does hematopoiesis in the thymus begin:
b. in the seventh or eighth week++
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