BGDB Practical - Sexual Differentiation Interactive

From Embryology
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Practical 12: Sex Determination | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities | 2011 Audio


Introduction

These are the interactive quizzes added to pages within the 2019 practical class.

Sex Determination Interactive Component

Attempt the Quiz - Sex Determination  
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Here are a few simple Quiz questions that relate to Sex Determination from the lecture and practical.


1

Sex determination occurs initially through the SRY transcription factor acting on the:

  primordial germ cells
  anterior pituitary
  testes support cells
  ovary support cells
  mesonephric duct cells

2

The cells in the adult male and female gonad forming from equivalent primordial cells in each sex are:

  Sertoli cells and thecal cells
  Leydig cells and interstitial cells
  primordial germ cells and oocytes
  thecal cells and interstitial cells
  ductus deferens and mesonephric ducts

3

The genes for testes-determining factors are located on the:

  short arm of the Y chromosome
  long arm of the Y chromosome.
  short arm of the X chromosome
  long arm of the X chromosome
  both the X and Y chromosomes contain these genes

4

The protein product of the gene SRY acts as a

  growth factor
  endocrine factor
  receptor protein
  transcription factor


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Practical 12: Sex Determination | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities | 2011 Audio


Additional Information: SRY | testis | sertoli cell

Early Embryo Interactive Component

Attempt the Quiz - Early Embryo  
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Here are a few simple Quiz questions that relate to Early Embryo from the lecture and practical.

1

The allantois, cloaca, hindgut and yolk sac are all lined with endoderm

true
false

2

The lower end of the mesonephric duct branches to form the:

  ureteric bud
  uterus bud
  urethral bud
  gonadal bud
  none of the above

3

The sequential development of the renal structures within intermediate mesoderm can best be described as:

  pronephros, metanephros, mesonephros
  mesonephric duct, metanephros, mesonephros
  pronephros, mesonephros, metanephros
  mesonephric duct, paramesonephric duct, metanephros
  uteric bud, ureter, urinary bladder

4

An embryo that contains the XX sex chromosomal complex. In the developing gonads:

  its medullary region differentiates and its cortex regresses
  its cortical region differentiates and its medulla regresses
  the presence of an X influences medullary differentiation
  neither the presence of the X chromosome nor absence of
  the Y chromosome influences development of the ovaries
  the SRY is expressed


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Practical 12: Sex Determination | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities | 2011 Audio


Additional Information:

Late Embryo Interactive Component

Attempt the Quiz - Late Embryo  
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Here are a few simple Quiz questions that relate to Late Embryo from the lecture and practical.

1

The sex cords give rise to all of the following except:

  Sertoli cells of seminiferous tubules
  ovarian follicular cells
  rete testes
  straight tubules of testes
  primordial germ cells

2

Select the correct options below for the embryonic contribution to the female uterus and vagina

  Wolffian duct
  Utereric duct
  Mullerian duct
  paramesonephric duct
  urogenital sinus

3

Select the correct options below describing aspects of gonad development

  testis cortical and ovary medullary
  ovary cortical and testis medullary
  prenatal meiosis in the ovary germ cells
  prenatal meiosis in the testis germ cells
  prenatal mitosis in the ovary germ cells

4

The mesenchyme of the genital ridge separating the seminiferous tubules gives rise to cells that secrete testosterone that binds to the receptors on the:

  yolk sac
  paramesonephric duct
  mesonephric duct
  metanephric blastema
  ureteric bud


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Practical 12: Sex Determination | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities | 2011 Audio


Additional Information: ovary | testis | testosterone | ureteric bud

Fetal Interactive Component

Attempt the Quiz - Fetal  
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Here are a few simple Quiz questions that relate to Fetal development from the lecture and practical.

1

Differentiation of the internal and external genital organs depends on the:

 genetic makeup of the embryo
 presence of gonads and their endocrine secretion
 placental hormones
 maternal hormones
 all of the above

2

The relative movement of organs with the peritoneal cavity can best be described as:

  descent of the adrenal glands and gonads
  ascent of the adrenal glands and genital tubercle
  ascent of the kidneys and descent of the gonads
  descent of the kidneys and adrenal glands
  none of the above

3

The genital tubercle and inner genital folds form the same adult structures in both sexes.

  true
  false

4

In a female fetus, the uterus develops from the:

  mesonephric duct
  paramesonephric duct
  somatic pleura
  urogenital sinus
  endoderm

5

In the male fetus, descent of the testes is caused by all of the following except:

  increased abdominal pressure
  presence of gut in the processus vaginalis
  enlargement of the inguinal canal by swelling of the gubernaculum
  reduction and regression of the gubernaculum
  straightening and lengthening of the body


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Practical 12: Sex Determination | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities | 2011 Audio


Additional Information: adrenal

Postnatal Interactive Component

Attempt the Quiz - Postnatal  
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Here are a few simple Quiz questions that relate to Postnatal development from the lecture and practical.

1

At about postnatally 2 months of age, in the male gonad primordial germ cells (gonocytes) are replaced by:

  adult dark spermatogonia
  adult pale spermatogonia
  spermatogonial stem cells
  primary spermatocytes

2

Precocious puberty, premature development of the signs of puberty, occurs at different ages for each sex. Which of the following about the ages of precocious puberty is not correct:

  precocious puberty can occur in girls before age 7
  precocious puberty can occur in girls before age 8
  precocious puberty can occur in boys before age 9
  precocious puberty can occur in boys before age 14

3

Puberty can occur over a broad range of time and differently for each sex. Which of the following are considered the normal age ranges for puberty.

  girls - age 7 to 13
  girls - age 9 to 15
  boys - age 7 to 13
  boys - age 9 to 15

4

Hypothalamic expression of gonadotropin releasing hormone (GnRH) is a known puberty trigger. Which of the following factors is thought to initiate the GnRH secretion?

  kisspeptin
  luteinizing hormone
  thyroid hormone
  anti-Müllerian hormone

5

Tanner stages (tanner scale) are an anatomical staging system for measuring male/female sexual development at puberty. How many discrete stages are there in this scale?

  3
  4
  5
  6
  none of the above

6

The Tanner stages (tanner scale) are an anatomical staging system and can also be used for determining the age of puberty.

  true
  false


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Practical 12: Sex Determination | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities | 2011 Audio


Additional Information: neonatal | kisspeptin | puberty | precocious puberty | delayed puberty | testis | spermatogonia | ovary | menstrual cycle | Tanner stages

Abnormalities Interactive Component

Attempt the Quiz - Abnormalities  
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Here are a few simple Quiz questions that relate to Abnormalities of genital development from the lecture and practical.

1

In a genetic male (44 x XY) who lacks androgen receptors, each of the following will be increased except:

  estradiol
  FSH
  LH
  progesterone
  testosterone

2

The best option below for a child born with ambiguous external genitalia could be:

  46,XX DSD a female pseudohermaphrodite
  46,XY DSD a male pseudohermaphrodite
  Ovotesticular DSD
  someone with Klinefelter’s syndrome
  any of the above

3

In monosomy XO (Turner’s syndrome):

  the children start normal male development
  the number of germ cells in the gonads starts decreasing after puberty
  the children grow disproportionately tall
  an active gene on a dormant X chromosome may account for the clinical manifestations
  all of the above might occur

4

If 46,XY DSD is due to androgen receptor disorders, then:

  the testes are normal for the most part
  the testosterone and DHT levels are normal
  MDIF is secreted by the Sertoli cells
  the fetus will have female external genitalia without a female genital tract
  all of the above is correct

5

Failure of formation and migration of the primordial germ cells results in:

  Turner’s syndrome
  Klinefelter’s syndrome
  46,XX DSD
  gonadal agenesis
  none of the above

6

Failure of the urethral folds to fuse prenatally would be expected to result in:

  epispadias
  exstrophy of urinary bladder
  horseshoe kidney
  hypospadias
  multiple ureters


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Practical 12: Sex Determination | Early Embryo | Late Embryo | Fetal | Postnatal | Abnormalities | 2011 Audio


Additional Information: genital abnormalities


Genital Links: genital | Lecture - Medicine | Lecture - Science | Lecture Movie | Medicine - Practical | primordial germ cell | meiosis | Female | X | ovary | corpus luteum |oocyte | uterus | vagina | reproductive cycles | menstrual cycle | Male | Y | testis | spermatozoa | penis | prostate | endocrine gonad‎ | Genital Movies | genital abnormalities | Assisted Reproductive Technology | puberty | Category:Genital


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Cite this page: Hill, M.A. (2019, August 18) Embryology BGDB Practical - Sexual Differentiation Interactive. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/BGDB_Practical_-_Sexual_Differentiation_Interactive

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© Dr Mark Hill 2019, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G