the luminal compartment; D
– meiosis and spermiogenesis occur in the basal
compartment; E
– primary spermatocytes pass from the basal compartment to the lumenal
one due to the formation of a new transitional compartment.
9. Each of the following statements concerning the testicular Leydig cells is true,
EXCEPT:
A
– are parts of the seminiferous epithelium; B – their cytoplasm is rich in sER, Golgi
complex, vesicular mitochondria, and lipid droplets; C
– produce androgens, mainly
testosterone; D
– their plasma membranes possess receptors for LH and estrogens; E –
primarily release the hormone into testicular lymph.
10. The following structures constitute the blood-testis barrier. Choose the firmest
structures providing the immune isolation:
A
– capillary wall; B – connective tissue; C – lymphatic sinusoid; D – Sertoli-Sertoli tight
junctions; E
– the tunica propria of seminiferous tubules.
11. Each of the following statements concerning the hormonal regulation of the
testis is true, EXCEPT:
A
– FSH effects on the Sertoli cells and they produce ABP in testicular fluid; B – LH effects
on the Leydig cells and they secrete testosterone; C
– ABP concentrates testosterone
within the tubules to regulate sperm maturation; D
– inhibin from Sertoli cells provides
feedback with LH; E
– testosterone is involved in feedback loop regulating LH production.
12. Each of the following statements concerning the epididymis is true, EXCEPT:
A
– has the head, body, and tail; B – sperm maturation in it is not androgen-dependent; C
– sperms acquire motility passing through it; D – its epithelial cells secrete glycoproteins
that are added to the sperm glycocalyx preventing from premature acrosomal reaction; E
–
smooth muscle coat of the ductus epididymis increases in thickness and becomes three-
layered in the tail.
13. Each of the following statements concerning the prostate gland is true, EXCEPT:
A
– surrounds the ejaculatory duct; B – its glands are mucosal, submucosal, and
peripheral; C
– the glandular epithelium depends on testosterone; D – the glands are
surrounded by connective tissue with bundles of smooth muscle cells; E
– its alveoli often
contain concretions, especially in elderly males.
Directions
: one or more of the given statements or completions is/are correct. Choose the
answer: A
– if only 1,2, and 3 are correct; B – if only 1 and 3 are correct; C – if only 2 and
4 are correct; D
– if only 4 is correct; E – if all are correct.
14. The intratesticular part of the male genital ducts includes:
(1) seminiferous tubules (2) rete testis (3) ductuli efferentes (4) straight tubules
15. The extratesticular part of the male genital duct system consists of:
(1) ductuli efferentes (2) ductus epididymidis (3) ductus deferens (4) ductus ejaculatorius
16. The following statements regarding the spermatogenic syncytium are true:
(1) is a specific association of differentiating cells (2) occurs because intercellular bridges
are present between the progeny of each stem spermatogonium (3) intercellular
connections remain intact until the last stages of spermatid maturation (4) all its cells
undergo synchronous divisions and differentiation
17. The spermatogenetic stage of maturation includes:
(1) first meiotic division (2) mitotic division (3) second meiotic division (4) sperm maturation
18. The spermatogenetic stage of formation includes:
(1) mitotic division (2) meiotic division of primary spermatocytes (3) meiotic division of
secondary spermatocytes (4) differentiation of spermatids into sperms
19. The physiological conditions that are necessary for spermatogenesis are as
follows:
(1) the presence of testosterone (2) temperature that is equal to body temperature (3)
isolation of spermatogenic cells from the immune system (4) the absence of any hormones