Embryonic tissues or structures involved with uterine development include: mesoderm urogenital sinus mesonephric ducts endoderm
Structures derived from the mesonephric ducts include the: seminiferous tubules ureter prostatic urethra ductus deferens
The scrotum of the male develops from: endoderm of urogenital sinus urethral groove urogenital folds genital or labioscrotal swellings
The penile urethra is derived from the: urogenital sinus pelvic part of the vesicourethral canal phallic part of the vesicourethral canal cloaca mesonephric duct
After the sinovaginal bulbs have proliferated and fused, they form a solid core of endodermal cells known as the: sinus tubercle prostatic utricle vaginal plate uterovaginal primordium vault of the vagina
The layer of ectodermal cells which canalizes to form urethra at the distal end of the glans of the male phallus is known as the: glandular plate urethral plate urogenital fold primitive corpora spongiosum phallic part of the UG sinus
The following structures are the derivatives of the primitive urogenital sinus EXCEPT: most of the urinary bladder male urethra female urethra upper part of vagina vestibule of the vagina
The following structures are developmental homologues: scrotum - labia minora scrotal ligament - round
ligament of uterus and ligament of ovary ductus deferens - uterine tube penile urethra - vagina
The structures of the female pelvis representing the homologue of the gubernaculum testis are: cardinal ligament of the uterus round ligament of the uterus suspensory ligament of the ovary medial umbilical ligament
Which of the following ligaments is derived from peritoneum? cardinal ligament of the uterus puboprostatic ligament ligament of the ovary suspensory ligament of the ovary round ligament of the uterus
The structures listed below are of mesodermal origin EXCEPT: cortex of the kidney renal pyramids renal pelvis ureter urethra
The embryonic origin(s) of the vagina is/are: urethral folds genital tubercle genital swellings sinovaginal bulbs cloaca
The embryonic origin(s) of the labia minora is/are: urethral folds genital tubercle genital swellings sinovaginal bulbs cloacal membrane
The embryonic origin(s) of the shaft of the penis is/are: urethral folds genital tubercle genital swellings sinovaginal bulbs cloacal membrane
The embryonic origin(s) of the scrotum is/are: urethral folds genital tubercle genital swellings sinovaginal bulbs cloacal membrane
The urogenital sinus is derived from: the mesonephric or Wolffian ducts the paramesonephric or Mullerian ducts both neither
020 The uterine tubes are derived from: the mesonephric or Wolffian ducts the paramesonephric or Mullerian ducts both neither
B. the paramesonephric or Mullerian ducts.
The uterine tubes, uterus and upper vagina develop from the female genital ducts, the paramesonephric ducts. Mesonephric duct becomes the epididymis, ductus deferens, seminal vesical and ejaculatory duct in the male. Female remnants of mesonephric duct may include epoophoron, paroophoron and Gartner's duct cysts.
The seminal vesicles are derived from: the mesonephric or Wolffian ducts the paramesonephric or Mullerian ducts both neither
The appendix of the epididymis is derived from: the mesonephric or Wolffian ducts the paramesonephric or Mullerian ducts both neither
Which of the following definitions is NOT true: hypospadias - defect in the wall of the male
urethra cryptorchismus - failure of descent of the
testis true hermaphrodite has male and female
gonads hydrocele testis - collection of fluid within the
testis tubules
With regard to the development of the testis: The embryonic origin of the germ cells is
from the germinal epithelium of the gonad. Ductuli efferentes of the testis are derived
from mesonephric tubules. The testis descends through the inguinal
canal due to contraction of the
gubernaculum. The duct of the epididymis, if uncoiled,
would measure less than a foot in length.
The uterus arises from: endoderm mesoderm both neither
The vagina arises from: endoderm mesoderm both neither
The following statements are true with respect to the development of the urogenital system: The germ cells, ova and sperm cells, are
derived from the intermediate mesoderm. The epididymis is derived from the
mesonephric duct. The Wolffian duct always disappears without
a trace in the female. The urinary bladder in the male is of
endodermal origin only.
The following structures are directly or indirectly derived from the mesonephric or Wolffian duct EXCEPT: part of the epididymis part of the kidney part of the urinary bladder seminal vesicles prostate
The following structures are the derivatives of the primitive urogenital sinus EXCEPT: most of the urinary bladder male urethra female urethra lower vagina ejaculatory ducts
Which of the following is NOT a correct association: congenital polycystic kidney - result of
defective union of mesonephric and
metanephric units urachal fistula - persistence of allantoic duct double ureter - early splitting of the ureteric
bud hydrocele testis - accumulation of fluid
within the testis
The derivatives of the Wolffian duct include each of the following EXCEPT: longitudinal duct of Gartner round ligament of uterus ductus deferens duct of the epididymis ejaculatory duct
Of the following, the one most closely associated with the prostate gland is: mesonephric tubules mesonephric duct paramesonephric duct genital swellings urogenital sinus
Of the following, the one most closely associated with the uterine tube is: mesonephric tubules mesonephric duct paramesonephric duct genital swellings urogenital sinus
Of the following, the one most closely associated with the efferent ducts of the testes is: mesonephric tubules mesonephric duct paramesonephric duct genital swellings urogenital sinus
Of the following, the one most closely associated with the vestibule in the female is: mesonephric tubules mesonephric duct paramesonephric duct genital swellings urogenital sinus
Of the following, the one most closely associated with the seminal vesicle is: mesonephric tubules mesonephric duct paramesonephric duct genital swellings urogenital sinus
Of the following, the one most closely associated with the urethra in the female is: mesonephric tubules mesonephric duct paramesonephric duct genital swellings urogenital sinus
A true hermaphrodite can be distinguished from a pseudohermaphrodite by: chromosome complement behavior appearance of external genitalia presence of both testicular and ovarian tissue
Abnormal development of external genitalia in an XY male would NOT be due to: 5-alpha reductase deficiency androgen receptor deficiency failure of androgen-receptor complex to elicit
a response in the nucleus failure in the cellular conversion of
testosterone to estradiol
In the absence of an inducing substance from the gonad of an XY fetus: the indifferent external genitalia may
develop into female or male structures a true hermaphrodite develops derivatives of the paramesonephric duct may
persist the indifferent stage in the genital system
persists in postnatal life
In the development of the genital system: primordial germ cells induce the indifferent
gonad to develop into ovary or testis primitive sex cords arise from coelomic
epithelium of the genital ridge in embryos of
both sexes cortical cords give rise to follicular cells medullary cords give rise to seminiferous
tubules in the male all of the above are correct
An individual has 44 + XY chromosomes with testes but his tissues are unresponsive to androgens. This individual may have: uterine tubes blind ending vagina prostate gland external appearance of a male
In the human, the mesonephros: is important in development of the internal
genital organs in the female is the definitive unit of the kidney contributes to the outlet ducts from the testis has a dual origin from splanchnic mesoderm
In the genital system:
A duplication abnormalities of the uterus may
be due to lack of fusion of paramesonephric
ducts the most common cause of female
pseudohermaphroditism is excessive
androgen production cryptorchism may be due to abnormal
androgen production pure gonadal dysgenesis may be due to
failure of primordial germ cells to seed the
indifferent gonad all of the above are correct
In the female: the clitoris forms from the genital swellings the ureter forms from the urogenital sinus the urogenital groove remains open and
forms the vestibule the labia minora are homologous to the
scrotum
In the development of the genital system, which is NOT correct: a true hermaphrodite has testicular and
ovarian tissue, regardless of genetic or
phenotypic sex genetic males convert testosterone to DHT,
leading to the development of male external
genitalia testosterone is converted to estradiol in the
brain, resulting in imprinting as male the genetic sex always determines the
development of the internal and external
genitalia
In the male, which is NOT correct: elongation of the genital tubercle forms the
phallus fusion of the urethral folds establishes the
penile urethra the genital swellings form the scrotum abnormal positioning of the genital tubercle
causes hypospadias
Concerning testicular feminization syndrome, which is NOT correct: individuals are males with a 44XY
chromosome complement the paramesonephric system is suppressed,
oviducts and uterus are absent external genital tissue is unresponsive
to androgen and develops along female lines there is a lack of androgen production by the
testes
At about what age do the testes begin to descend into the scrotum? 4 months 5 months 6 months 7 months 8 months
Which of the following are functional derivatives of the mesonephros? efferent ductules of the male uterine tube of the female both neither
The paramesonephric ducts in female embryos give rise to the: uterine tubes and uterus epoophoron inferior fifth of the vagina round ligament of the uterus ovarian ligament
Which of the following gives rise to the labia majora? genital folds genital swellings genital tubercle urorectal fold inguinal fold
Which of the following is a remnant of the gubernaculum? prostatic utricle ductus deferens median umbilical ligament vagina labium majora seminal vesicle proper ovarian ligament urinary bladder clitoris ureter uterine tube testis kidney labium minora
Which of the following develops from the genital tubercle? prostatic utricle ductus deferens median umbilical ligament vagina labium majora seminal vesicle proper ovarian ligament urinary bladder clitoris ureter uterine tube testis kidney labium minora