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Embryology > Embryology MCQ > Flashcards

Embryology MCQ Flashcards

1
Q

Vemix caseosa is a fatty substance covering by the end of the intrauterine life:

A

Skin of the fetus

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2
Q

The buccopharyngeal mebraneis formed by:

A

Ectoderm and endoderm

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3
Q

Placenta previa result from implantation in:

A

The region of the internal opening (os) of the cervix

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4
Q

Erythboblastosis is fetalis disease may occur in cases where:

A

The fetus is RH(+) and the mother is RH(-)

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5
Q

Cotyledons are compartments of:

A

Umbilical cord

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6
Q

Situs inversus is a condition occurring in approximately 20% of patients with:

A

Kartagener syndrome

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7
Q

The embryo at the time of implantation is in the :

A

8-cell stage

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8
Q

Maintaining of structure and function of corpus luteum during the first intrauterine of pregnancy depending on:

A

hCG

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9
Q

The length of a normal pregnancy is considered to be:

A

280 days after fertilization

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10
Q

During ovulation extruded from ovary to the uterine tube is the:

A

Secondary occyte in metaphase

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11
Q

The lens placode is a derivative of:

A

Ectodermal germ layer

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12
Q

Which one is not the approach used for assisted reproductive technology?

A

a. ICSI
b. ZIFT
c. OMI

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13
Q

A phenomenon occurring during the third week of development is:

A

Formation of the notochord

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14
Q

The parenchyma of the thyroid gland develops from the:

A

Endoderm

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15
Q

Which one is the derivative of somite?

A

Subcutaneous tissue of the skin

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16
Q

The process of compaction occurs at:

A

8-cell stage

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17
Q

The secondary yolk sac in an embryo is at age of:

A

13 days

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18
Q

The umbilical cord during the end of 4th month containg

A

a. One artery and one vein
b. Two arteries
c. One artery and two veins
d. Two artery and two veins
e. None of them

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19
Q

The uteroplacental circulation begins by the end of the:

A

Secondary week of the development

20
Q

An abnormal number of sex chromosomes occurs in:

A

Tumer syndrome

21
Q

Interior parathyroid gland develops from:

A

3rd pharyngeal pouch

22
Q

Vitelline duct:

A

Connects cavity of yolk sac with midgut

23
Q

Chorion frondosum has got contact with:

A

Decidua basalis

24
Q

Ultimobranchial body contributes cells to:

A

Thyroid

25
Q

Which one is a phenomenon occurring during the acrosome reaction?

A

Release of trypsin-like enzymes and acrosin

26
Q

Sirenomelia (caudal dysgenesis) results from insufficient formation in the lumbosacral region:

A

Mesoderm

27
Q

Which one is a component of the uterus?

A

Basal layer

28
Q

Spermatogenesis is a process resulting in the transformation of:

A

Spermatogonia into spermatozoa

29
Q

The process of formation of blood vessels by sprouting from existing vessels:

A

Angiogenesis

30
Q

Most frequently the ectopic pregnancies occur in the:

A

Ampulla off the uterine tube

31
Q

What is the most sensitive period of development of the fetus?

A

3rd to 8th week

32
Q

Which proteins controls cell invagination in gastrulation?

A

FGF8

33
Q

What is not a congenital malformation due to rubella virus?

A

A. Cataract
B. Heart defects
C. Deafness
D. Glaucoma

E. mental retardation

34
Q

What is the main function(s) of the placenta ?

A 
A. Transmission of maternal antibodies
B. Hormone production
C. Exchange of gases
D. exchange of nutrients and electroytes
E. all of the above
35
Q

What is the only monosomy compatible with life?

A

Turner Syndrome

36
Q

Which of the hormones may be important for establishment of right sidedness?

A

Snail

37
Q

When is the physiological umbilical hernia completely withdrawn into the body of the embryo?

A

end of 3rd month

38
Q

On what day does the primitive streak clearly visible?

A

15-16 day

39
Q

How long is a pregnancy?

A

266 days, 38 weeks after fertilization

40
Q

Which of the following is NOT a fetal membrane?

A

A. chorion
B. yolk sac
C. amnion
D Heuser’s membrane

41
Q

What is not a structure of tertiary villus in the 3rd week?

A

A. capillaries
B. intervillous space
C. cytotrophoblasts
D. spiral artery

42
Q

Which of the structures does NOT derivate from the mesoderm germ layer?

A

A. Urinary bladder

43
Q

At what day does the neural tube approximately close?

A

Cranial part at day 25th, caudal part at day 27th

44
Q

What is the rate for monozygotic twins?

A

3-4 pr 1000 births

45
Q

What is true about homeobox genes?

A
  • Are transcription factors that contain a homeobox
  • Important for pattering of embryonic axis
  • Helps establishing different regions of the brain
  • Plays a role in determining the origin and type of gut derivatives
46
Q

Why will a fetus born early in the sixth month have difficulties surviving?

A

The coordination between the respiratory system and CNS is not well established

Embryology (9 decks)

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