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CHE - Embryology

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CHE - Embryology

CHE - Embryology

Question 1 of 35

1

Fertilization ability of the spermatozoon is preserved for 24 - 30 hours.

Select one of the following:

  • True
  • False

Explanation

Question 2 of 35

1

Two veins and one artery are present in the umbilical cord of the newborn body.

Select one of the following:

  • True
  • False

Explanation

Question 3 of 35

1

The yolk sack (sacculus vitellinus) takes part in the formation of the embryo discus.

Select one of the following:

  • True
  • False

Explanation

Question 4 of 35

1

Amnion is not involved in the formation of the embryo discus.

Select one of the following:

  • True
  • False

Explanation

Question 5 of 35

1

The cells obtained as a result of segmentation are called blastomers.

Select one of the following:

  • True
  • False

Explanation

Question 6 of 35

1

The trophoblast related structures are associated with the implantation and nutrition of the embryo.

Select one of the following:

  • True
  • False

Explanation

Question 7 of 35

1

The smooth chorion (chorion laeve) takes part in the formation of the fetal sack.

Select one of the following:

  • True
  • False

Explanation

Question 8 of 35

1

The embryoblast cells situated on the floor of the amnion differentiate into the ectoderma.

Select one of the following:

  • True
  • False

Explanation

Question 9 of 35

1

The chorion frondosum participates in the formation of placenta.

Select one of the following:

  • True
  • False

Explanation

Question 10 of 35

1

Linea primitiva (the primitive line) is a temporary structures related to the organization of the mesoderma.

Select one of the following:

  • True
  • False

Explanation

Question 11 of 35

1

The sperm volume is normally is:

Select one of the following:

  • 2 - 6 ml

  • 6 - 8 ml

  • 8 - 10 ml

  • 10 - 12 ml

Explanation

Question 12 of 35

1

The II type oocyte has a fertilization ability during:

Select one of the following:

  • 6-12 hours

  • 12 - 24 hours

  • 24 - 36 hours

  • 36 - 72 hours

Explanation

Question 13 of 35

1

The spermatozoa number in 1cm3 sperm is:

Select one of the following:

  • 10 - 30 x10(6) / cm3

  • 400 - 500 x10(2) / cm3

  • 40 - 120 x10(6) / cm3

  • 130 - 160 x10(6) / cm3

Explanation

Question 14 of 35

1

The minimum part of mobiles spermatozoa in the sperm necessary for fertilization is above:

Select one of the following:

  • 10%

  • 20%

  • 30%

  • 50%

Explanation

Question 15 of 35

1

The process of transformation of spermatids into spermatozoa is called:

Select one of the following:

  • Spermation

  • Spermiogenesis

  • Capacitation

  • Acrosomal reaction

Explanation

Question 16 of 35

1

The trophoblast is part of:

Select one of the following:

  • Embryoblast

  • Blastocysta

  • Magma reticularis

  • Amnion cavity

Explanation

Question 17 of 35

1

The consecutive stages in the embryogenesis are:

Select one of the following:

  • Morulla - Blastocyta - Organogenesis - Gastrulation

  • Morulla - Blastocyta - Gastrulation - Organogenesis

  • Blastocyta - Morulla - Gastrulation - Organogenesis

  • Organogenesis - Morulla - Gastrulation - Blastocyta

Explanation

Question 18 of 35

1

The somites derive from:

Select one of the following:

  • Mesoblast

  • Endoblast

  • Ectoblast

  • Mesenchyme

Explanation

Question 19 of 35

1

The dermatomes form:

Select one of the following:

  • Skin epithelium

  • Skin connective tissue

  • Skeletal muscles

  • Embryo's skeleton

Explanation

Question 20 of 35

1

The segmentation by human embryo is:

Select one of the following:

  • The formation of many small holes in the acrosome

  • Penetration of spermatozoon through corona radiata of the oocyte

  • Penetration of spermatozoon through zona pellucida of the oocyte

  • Series of mitosis in the zygote during its movement through the oviduct.

Explanation

Question 21 of 35

1

Which element is not included in the placental barrier:

Select one of the following:

  • Cytotrophoblast

  • Syncytial trophoblast

  • Capillaries of the placental villae

  • Capillaries of the uterus wall

Explanation

Question 22 of 35

1

The implantation starts:

Select one of the following:

  • On the first day after the fertilization

  • 6-7 days after the fertilization

  • 10 days after the fertilization

  • 15 days after the fertilization

Explanation

Question 23 of 35

1

The fertilization is completed in:

Select one of the following:

  • Uterus cavity

  • Oviduct cavity

  • Abdomen

  • Ovary

Explanation

Question 24 of 35

1

What type of function is the oocyte cortical reaction

Select one of the following:

  • Trophic

  • Receptor

  • Barrier

  • Phagocytic

Explanation

Question 25 of 35

1

The umbilical cord of the newborn baby consists of:

Select one of the following:

  • Two arteries and two veins

  • Two arteries and one vein

  • Two veins and one artery

  • One artery and one vein

Explanation

Question 26 of 35

1

Which of the following is typical for monozygotic twins:

Select one or more of the following:

  • They don't look alike

  • They look alike

  • They can be of a different gender

  • They are always the same gender

  • There are no differences in their immunological characteristics

Explanation

Question 27 of 35

1

The somites (epimer of the mesoblast) form:

Select one or more of the following:

  • Dermatomes

  • Sklerotomes

  • Myotomes

  • Nephrotomes

  • Hypomer

Explanation

Question 28 of 35

1

From the mesenchyme derivates:

Select one or more of the following:

  • Cardiac muscle tissue

  • Smooth muscle tissue

  • Skeletal muscle tissue

  • Blood tissue

  • Microglia

Explanation

Question 29 of 35

1

From the ectoblast derivates:

Select one or more of the following:

  • Nervous tissue

  • Blood tissue

  • Skin epithelium (epidermis)

  • Epithelium of the oral cavity

  • Smooth muscle tissue

Explanation

Question 30 of 35

1

The fetal sack wall consists of:

Select one or more of the following:

  • Amnion

  • Smooth chorion (chorion laeve)

  • Placental villae

  • Covering decidua (decidua capsularis)

  • Basal decidua

Explanation

Question 31 of 35

1

The placental barrier after the third month of embryogenesis consists of:

Select one or more of the following:

  • Syncytial trophoblast

  • Cytotrophoblast

  • Epithelium of the placental capillaries

  • Mesenchyme of the placental villa

  • Epithelium of the uterus capillaries

Explanation

Question 32 of 35

1

The maternal part of the placenta consists of:

Select one or more of the following:

  • Cotyledones

  • Loose connective tissue slips (septae)

  • Blood lacunea

  • Amnion

  • Chorionic plate

Explanation

Question 33 of 35

1

The fetal part of the placenta consists of:

Select one or more of the following:

  • Loose connective tissue clips (septae)

  • Blood lacunae

  • Chorion frondosum

  • Amnion

  • Cotyledones

Explanation

Question 34 of 35

1

Which of the following are specific for the acrosomal reaction:

Select one or more of the following:

  • Releasing of the acrosomal enzymes

  • Facilities the penetration of spermatozoon through zona pellucida of the oocyte

  • Type of endocytosis

  • Completed after the spermatozoon receptor binding to zona pellucida

  • Completed after the fertilization

Explanation

Question 35 of 35

1

Which of the following are specific for the cortical reaction is:

Select one or more of the following:

  • Completed in corona radiata

  • Associated with releasing of the acrosomal enzymes

  • Associated with releasing of the proteolytic enzymes under the oocyte plasmalemma

  • Associated with destroying of the spermatozoon receptor in zona pellucida

  • Blocks the passing of more than one spermatozoon into the oocyte.

Explanation

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