20. The following statements regarding the vulnerability of spermatogenic cells are
true:
(1) spermatogenic cells are not sensitive to noxious agents (2) spermatogenic cells are
very sensitive to noxious agents (3) proliferating cells are not sensitive to injury (4) stem
spermatogonia are much less vulnerable then actively dividing and differentiating cells
21. The tunica propria of the seminiferous tubules consists of:
(1) basal lamina (2) collagen and elastic fibres (3) several layers of myoid cells (4)
amorphous ground substance
22. The following statements regarding the seminiferous epithelium are true:
(1) is complex stratified epithelium (2) is composed of two cell populations (3) the Sertoli
cells are its true epithelial parts (4) spermatogenic cells are its principal parts
23. The androgens are responsible for:
(1) normal development of the male fetus (2) development and maintenance of secondary
male sex characteristics (3) initiation and maintenance of sperm production (4) initiation
and maintenance of the male accessory gland functions
24. The following statements regarding the testicular interstitial connective tissue
are true:
(1) is testicular endocrine part due to the presence of Leydig cells (2) its blood capillaries
are continuous (3) contains lymphatic sinusoids surrounding the seminiferous tubules like
sheathes (4) its blood capillaries are sinusoidal fenestrated
25. The following statements regarding the blood-testis barrier functions are true:
(1) creates specific chemical composition for spermatogenic cell development (2) provides
hormonal homeostasis in the seminiferous tubules (3) isolates antigenic spermatocytes
and spermatids from the immune system (4) prevents sperm antigen entering the systemic
circulation
26. The ductus deferens wall consists of the following tunics:
(1) mucosa (2) adventitia (3) three-layered muscularis (4) submucosa
22. FEMALE REPRODUCTIVE SYSTEM
– I
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 large growth of ovogenesis is
true, EXCEPT:
A
– begins at puberty; B – is represented by primary oocytes leaving the dictyotene; C –
includes accumulation of organelles, yolk granules, and cortical granules; D
– lasts about
two weeks until just before ovulation; E
– is hormone-independent.
2. Each of the following statements concerning the ovogenesis stage of maturation
is true, EXCEPT:
A
– the primary oocyte completes the first meiotic division shortly before ovulation; B – the
secondary oocyte begins the second meiotic division at ovulation; C
– cytoplasm division
between daughter cells is equal; D
– the second meiotic division progresses only to
metaphase when it is arrested; E
– the second meiotic division is completed if the
secondary oocyte is fertilized.
3. Each of the following statements concerning the ovary is true, EXCEPT:
A
– is invested by a connective tissue capsule and the germinal epithelium; B – its
germinal epithelium is a source of new oogonia; C
– its cortex contains follicles, atretic
bodies, and the corpus luteum; D
– its medulla contains connective tissue with blood
vessels, lymphatics, and nerves; E
– produces female gametes and secretes female sex
hormones.