(1) mechanical and chemical protection (2) outer exchange (3) secretion (4) maintenance
of homeostasis
15. The epithelium lining the intestine is characterized by the following features:
(1) contains goblet cells (2) is simple columnar (3) has the brush border (4) is specialized
for absorption
16. The specializations of epithelial cells on the apical surface are as follows:
(1) hemidesmosomes (2) microvilli (3) nexuses (4) cilia
17. The specializations of epithelial cells on the basal surface are as follows:
(1) hemidesmosomes (2) desmosomes (3) plasma membrane infoldings (4) nexuses
18. The specializations of epithelial cells on the lateral surface are as follows:
(1) tight junctions (2) desmosomes (3) nexuses (4) hemidesmosomes
19. The following statements regarding the apocrine mode of secretion are true:
(1) inheres in some sweat glands (2) inheres in the mammary gland (3) is characterized by
releasing the apical cell cytoplasm with secretory material (4) its mechanism is exocytosis
20. The following statements regarding the merocrine mode of secretion are true:
(1) is characterized by releasing the apical cell cytoplasm with secretory material (2)
inheres in sebaceous glands (3) is characterized by releasing the entire cell with secretory
material (4) its mechanism is exocytosis
21. The following statements regarding the holocrine mode of secretion are true:
(1) inheres in sebaceous glands (2) its mechanism is exocytosis (3) is characterized by
releasing the entire cell with secretory material (4) inheres in sweat glands
22. In embryogenesis the epithelia are derived from:
(1) mesoderm (2) ectoderm (3) endoderm (4) mesenchyme
3. BLOOD
Directions
: each of the following statements contains five suggested completions. Choose
the one that is best in each case.
1. Each of the following statements concerning the erythrocytes is true, EXCEPT:
A
– are 7-8
m biconcave discs; B
– contain cytoskeletal microfilaments; C – lack nuclei
and organelles; D
– are cell fragments; E – contain hemoglobin.
2. Each of the following statements concerning the platelets is true, EXCEPT:
A
– contain small dense nuclei; B – are megakaryocyte fragments; C – are surrounded by
the plasma membrane; D
– exhibit hyalomere and granulomere; E – contain serotonin and
thromboplastin.
3. Each of the following statements concerning the leukocytes is true, EXCEPT:
A
– are motile; B – function in loose connective tissue; C – have nuclei and cytoplasm; D –
all of them are capable of phagocytosis; E
– take part in defence reactions.
4. Each of the following statements concerning the neutrophils is true, EXCEPT:
A
– their nuclei consist of 3-5 lobes; B – contain azurophilic granules; C – contain specific
granules; D
– comprise 6-8% of all leukocytes; E – are microphagocytes.
5. The azurophilic (primary) granules occurring in all kinds of leukocytes contain:
A
– histamine; B – hydrolytic enzymes; C – heparin; D – bactericidal substances; E –
thromboplastin.
6. Each of the following statements concerning the band neutrophils is true,
EXCEPT:
A
– are mature neutrophils; B – have horseshoe-shaped nuclei; C – comprise about 5% of
all neutrophils; D
– their increase in number is called “a shift of the leukocytic formula to
left”; E – they increase in number in inflammatory conditions.
7. Each of the following statements concerning the basophils is true, EXCEPT: