are primary, if they contain small lymphocytes; E
– its lymphatic nodules are secondary, if
they possess the germinal centres.
2. Each of the following statements concerning the lymph node sinuses is true,
EXCEPT:
A
– are narrow spaces between connective tissue (capsule, trabeculae) and lymphatic
tissue (nodules, cords); B
– are subcapsular, peritrabecular, and medullary; C – lack their
own lining; D
– contain reticular cells, fibres, and macrophages; E – drain and filter lymph.
3. Each of the following statements concerning the spleen white pulp is true,
EXCEPT:
A
– consists of periarterial lymphatic sheathes and lymphatic nodules; B – contains the
central artery; C
– its lymphatic nodules are a B-dependent zone; D – its periarterial
sheathes are a T-dependent zone; E
– contains splenic sinuses.
4. Each of the following statements concerning the spleen red pulp is true, EXCEPT:
A
– its stroma consists of reticular tissue; B – contains the central artery; C – includes red
blood cells, granulocytes, lymphocytes, numerous plasma cells, and macrophages; D
–
contains splenic sinuses; E
– erythrocytes are destroyed and phagocytosed by
macrophages here.
5. Each of the following statements concerning the diffuse lymphatic tissue and
lymphatic nodules is true, EXCEPT:
A
– are located in the tunica mucosa of the alimentary canal, respiratory passages, urinary
passages, and genital tract; B
– are unencapsulated concentrations of lymphocytes; C –
filter lymph and extract antigens from it; D
– their lymphocytes after an encounter with
antigen migrate to regional lymph nodes where they undergo proliferation and
differentiation; E
– cells returning to the lamina propria are effector lymphocytes.
6. Each of the following statements concerning the palatine tonsil is true, EXCEPT:
A
– has crypts containing cellular debris; B – its stratified squamous epithelium is not
infiltrated by lymphocytes; C
– its connective tissue is infiltrated by lymphocytes; D –
contains lymphatic nodules distributed along the crypts; E
– possesses thin connective
tissue capsule.
7. Each of the following statements concerning the germinal centre of lymphatic
nodules is true, EXCEPT:
A
– is a morphological indication of the lymphatic tissue response to antigens; B – contains
large lymphocytes (lymphoblasts); C
– reveals blast mitotic divisions; D – contains
differentiating plasma cells; E
– includes macrophages.
8. Each of the following statements concerning humoral immunity is true, EXCEPT:
A
– B lymphocytes are responsible for this type of immunity; B – macrophages and T
lymphocytes do not take part in humoral immunity; C
– activated B lymphocytes are
transformed into immunoblasts; D
– immunoblasts differentiate into plasma cells; E –
plasma cells synthesize specific antibodies.
9. Each of the following statements concerning cell-mediated immunity is true,
EXCEPT:
A
– T lymphocytes are responsible for this type of immunity; B – activated T lymphocytes
are transformed into lymphoblasts; C
– lymphoblasts proliferate and differentiate into
effector cells; D
– memory cells are not produced in the differentiation of T lymphoblasts; E
– cytotoxic T lymphocytes direct their killer activity against virus-effected cells, cancer
cells, cells with mutations, and graft cells.
10. Antigen-dependent differentiation of T lymphocytes results in the formation of
the following cell types, EXCEPT:
A
– plasma cells producing specific antibodies; B – T killer cells, primary effectors of cell-
mediated immunity; C
– T helper cells aiding in B cell differentiation; D –T suppressor cells
suppressing B cell differentiation; E
– T memory cells able to respond more quickly to the
next encounter with the same antigen.
11. Each of the following statements concerning T helper cells is true, EXCEPT: