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Histology > 1003 > Flashcards

1003 Flashcards

1
Q

Gametogenesis

A

1st week

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2
Q

Fertilization

A

1st week

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3
Q

Implantation

A

One week after fertilization

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4
Q

Development of CNS

A

3rd week

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5
Q

Embryonic folding

A

4th week

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6
Q

Bilaminar and trilaminar discs should be present before

A

Embryonic folding

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7
Q

Whatisitcalledwhentheblastocystattachestotheliningof the uterus?
• A. Ovulation
• B. Mitosis
• C. Implantation
• D. Fertilization

A

C

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8
Q

Human embryology’’ is the science concerned with the origin and development of a human being from:
• A-birthtopubertyB-spermandovumtozygoteC-azygotetobirthofan infant D- 6th week to birth

A

C

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9
Q

When does the implantation process begin and end?
• A-Fertilizationto8thweekB-Beginningofweek2tillthe12thdayC-12th day to birth D- Fertilization to the end of the first week

A

B

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10
Q

Epiblast layer is adjacent to ……….
• A-AmnioticcavityB-posteriorsurfaceoftheuterusC-YolkcavityD-
Cortex of the ovary

A

A

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11
Q

Where does the spermatogenesis occur?
• A-CortexofOvaryB-EndometriumC-EpididymisD-Seminiferoustubules

A

D

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12
Q

Spermcannotfertilizeanegguntilthey
A) Lose their acrosome.
B) Undergo capacitation.
C) Are activated by nurse cells of the vagina. D) Are in the vagina for 3 days.

A

B

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13
Q

What is the time of formation of all primary oocytes?
A. 4th week of embryonic life
B. 5th month of fetal life
C. At birth
D. 5th month of infancy
E. in adolescence

A

B

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14
Q

Duringgastrulation,
• A)Definiteorgansbegintoappear.
• B)Theplacentaisformed.
• C)Theblastodiscisformed.
• D)Germlayersareformed.
• E)Cellsfromthehypoblastmovetotheepiblast.

A

D

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15
Q

Where does the sperm capacitation process take place?

A

Capacitation

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16
Q

What is the embryonic origin of the epidermis and dermis?

A

Ectoderm and mesoderm

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17
Q

Which of the following events in oogenesis takes place immediately after the completion of the 2nd meiosis?

A Degeneration of the zona pellucida
B Corona radiata binding to sperm
C Formation of female ponucleus
D Blastocyst appearance
E Completion of the division

A

C

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18
Q

Which stage of the development of the ovarian follicle is characterized by the initial period of the first follicular fluid accumulation?
A) Graafian follicle B) Mature follicle
C) Primordial follicle D) Oocyte
E) Secondary follicle

A

E

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19
Q

Which of the following is the first stage of meiosis in which primary oocytes wait until puberty?
A) Interphase
B) Prophase
C) Metaphase D) Anaphase E) Telophase

A

B

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20
Q

Where sperm is produced…
A) Vesicle seminalis B) Ductus deferens C) Epididymis
D) Prostate
E) Seminiferous tubule

A

E

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21
Q

What is the estimated number of primary oocytes in a healthy pubertal woman?

A

400000

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22
Q

Most common site of fertilization?

A

Ampulla

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23
Q

What is the site of implantation?

A

Uterine wall1 uterus

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24
Q

Where is the most common area of ectopic implantation?

A

-Tuba uterina

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25
Q

Which mass will develop the embryo in the blastocyst?

A

• Embryoblast will develop the embryo in the blastocyst

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26
Q

Which mass will be included in the placental structure in the blastocyst?

A

Trophoblast

27
Q

Invasive cell that allows the blastocyst to be embedded in the endometrium by dissolving the endometrial stroma?

A

-Synstyotrophoblast

28
Q

Which participates in bilaminar germ disc formation
I. Hypoblast II. Epiblast
III. Amnioblast

A

I-İİ

29
Q

Which cell participates in the formation of the Heuser membrane?
a) Embryoblast b) Hypoblast
c) Epiblast
d) Trophoblast
e) Cytotrophoblast

A

B

30
Q

What happens during the gastrulation period?
Epiblast development
Primitive streak
Notachord formation

A

I

31
Q

How soon after fertilization does implantation take place?
A. By 12 hours
B. By 30 hours
C. Day3
D. Day4
E. Day6

A

E

32
Q

Which two embryological structures together form the bilaminar disk?
A. Cytotrophoblast and Hypoblast
B. Hypoblast and Epiblast
C. Epiblast and Cytotrophoblast
D. Syncytiotrophoblast and Inner cell mass
E. Epiblast and Embryoblast

A

B

33
Q

The amniotic cavity forms during the process of implantation of the blastocyst. The amniotic cavity forms within which of the following structures?
A. Epiblast
B. Cytotrophoblast
C. Syncytiotrophoblast
D. Maternal endometrium
E. Hypoblast

A

A

34
Q

The notochord develops from which of the following embryonic germ layers?
A. Endoderm
B. Ectoderm
C. Mesoderm
D. Neuroectoderm
E. Neural crest cells

A

C

35
Q

Neural crest cells develop during a process known as neurulation. These cells can ultimately form which of the following?
A. Melanocytes
B. Lymphocytes
C. Somites
D. All of the above

A

A

36
Q

Somites form from which of the following embryological derivations?
A. Paraxial mesoderm
B. Lateral plate mesoderm
C. Neural crest cells
D. Endoderm
E. Ectoderm

A

A

37
Q

In a growing embryo, the vertebrae encase notochord and neural tube in a solid bone like structure. Vertebrae are formed from which of the following embryological structures?
I. Dermatomes II. Myotomes
III. Sclerotomes

A

III

38
Q

The nucleus pulposus is the embryological remnant of which of the following?
A. Neural plate
B. Neural tube
C. Neural crest cells
D. Sclerotomes
E. Notochord

A

E

39
Q

The part of the sperm containing proteolytic enzymes to digest the zona pellucida is?

A

Acrosome

40
Q

During the second week of development the trophoblast differentiates into…

A

cytotrophoblast, syncytiotrophoblast

41
Q

Which structure is not observed in the second week of embryonic development?
A. Amniotic cavity
B. Yolc sac
C. Neural plate Develops in 3rd week
D. Connecting stalk

A

C

42
Q

What are the approximate days of the beginning of uteroplacental circulation?

A

11-12 DAYS Uteroplacental circulation begings to develop during the second week

43
Q

What is the main event of the 3rd week of development?

A

The main event of the 3rd week is gastrulation: formation of 3 germ layers
-Endoderm
-Mesoderm
-Ectoderm

44
Q

Which cell type induces the formation of the primitive streak?

A

Epiblast cells

45
Q

1) Which of the following statements is true?
A) Corpus albicans is transformed into corpus luteum
B) Primary oocytes undergo first and second meiosis during prenatal life
C) Ovulated secondary oocyte is captured by fimbriae of the uterine tube
D) Corpus luteum of pregnancy is degenerated within a week.
E) Primordial germ cells are originated from the endodermal layer of
amniotic cavity.

A

C

46
Q

2)Which of the following structures possesses corona radiata?
A) Mature Graafian follicle
B) Early primary follicle
C) Late primary follicle
D) Corpus luteum
E) Corpus albicans

A

A

47
Q

Which of the following statements is true?
A) Corpus albicans is transformed into corpus luteum
B) Primary oocytes undergo first and second meiosis during prenatal
life
C) Ovulated secondary oocyte is captured by fimbriae of the uterine
tube
D) Corpus luteum of pregnancy is degenerated within a week.
E) Primordial germ cells are originated from the endodermal layer of
amniotic cavity.

A

C

48
Q

Which of the following structures possesses corona radiata?
A) Mature Graafian follicle
B) Early primary follicle
C) Late primary follicle
D) Corpus luteum
E) Corpus albicans

A

A

49
Q

When does the implantation begins and end?
A) Fertilization to 8th week
B) Begining of the week till the 12 th day
C) 12 th day to the birth
D) Fertilization to the first week

A

B

50
Q

Where does the spermatogenesis occur?
A)Endometrium
B) Semineferous tubules
C) Ovary
D) Amniotic cavity
E) Yolk cavity

A

B

51
Q

Which of the following provides an important induction for the formation of neural plate?
A) Epiblast
B) Notochord
C) Yolk sac
D) Heuser’s membrane
E) Allantois

A

B

52
Q

Concerning the somites, which of the following is responsible for the
development of skeletal muscle ?
A) Sclerotome
B) Myotome
C) Dermatome
D) Lateral mesoderm
E) Intermediate mesoderm

A

B

53
Q

Fill in the blank: Concerning the oogenesis, in which stage cellular division of
primary oocyte is arrested ?
A) Interphase
B) Metaphase of first meiosis
C) Prophase of first meiosis
D) Anaphase of second meiosis
E) Prophase of second meiosis

A

C

54
Q

What is the female gametogenesis period name?
A) Oogenesis
B) Spermatogenesis
C) Bilaminar germ disc

A

A

55
Q

What is the main process formation of third week?
A) Oogenesis
B) Spermatogenesis
C) Trilaminar germ disc
D) Notochord
E) Primordial germ cell

A

C

56
Q

Where is the embryo implantation area?
A)Endometrium of uterus
B) Fallop tube

A

A

57
Q

What is the main process formation of second week?
A) Oogenesis
B) Spermatogenesis
C) Bilaminar germ disc
D) Notochord
E) Primordial germ cell

A

C

58
Q

What is the order at which the following are
developed?
Embryo -> Blastocyst -> Morula -> Zygote
Zygote -> Blastocyst -> Morula -> Embryo
Zygote -> Morula -> Blastocyst -> Embryo
Morula -> Blastocyst -> Zygote -> Embryo

A

3

59
Q

When is the critical period at which primordial
of all organ systems are established?
Embryonic period - weeks 3-8
Embryonic period - weeks 9-38
Fetal period - weeks 3-8
Fetal period - weeks 9-38

A

A

60
Q

The first two intraembryonic germ
layers to differentiate are the:
ectoderm & hypoblast
epiblast & hypoblast
ectoderm & endoderm
ectoderm & mesoderm

A

2

61
Q

The yolk sac in the human embryo:
does not contribute to the embryonic gut
is devoid of hemopoietic activity, or blood cell
formation
is the site of primordial germ cell production
stores nutrients throughout pregnancy

A

3

62
Q

Teratomas are:
the product of teratogens
malformed fetuses
a type of tumor containing tissue from all
germ layers
derived from trophoblast
none of the above

A

A type of

63
Q

What process converts the bilaminar disc
into the trilaminar embryonic disc consisting
of ectoderm, mesoderm, and endoderm?
somitogenesis
transformation
gastrulation
neurulation

A

Gastrulation

64
Q

What process converts the bilaminar disc
into the trilaminar embryonic disc consisting
of ectoderm, mesoderm, and endoderm?
somitogenesis
transformation
gastrulation
neurulation

A

Gastrulation

Histology (2 decks)

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