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general embryology quiz for block 2 exam Dr.Youssef Shoukry

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Quiz on general embryology quiz for block 2 exam Dr.Youssef Shoukry, created by youssef shoukry on 17/11/2018.
youssef shoukry
Quiz by youssef shoukry, updated more than 1 year ago
youssef shoukry
Created by youssef shoukry about 6 years ago
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Question 1

Question
The primitive streak develops in which layer of embryonic disc?
Answer
  • a. Epiblast.
  • b. Hypoblast.
  • c. Mesoderm.
  • d. Endoderm.
  • e. Notochord.

Question 2

Question
. Which of the following is derived from somites:
Answer
  • a. Dermis.
  • b. Ganglia.
  • c. Pleura.
  • d. Lungs.
  • e. Kidneys.

Question 3

Question
An umbilical cord attached to the margin of placenta is called:
Answer
  • a. Velamentous insertion of cord.
  • b. Placenta accreta.
  • c. Battledore placenta.
  • d. Succenturiata placenta.
  • e. False cord knot.

Question 4

Question
The number of somlres during the 22nd day is:
Answer
  • a. Two.
  • b. Four.
  • c. Seven.
  • d. Ten.
  • e. Thirteen.

Question 5

Question
Nucleus pulposus of intervertebral disc develops from the:
Answer
  • a. Neural crest.
  • b. Notochord.
  • c. Sclerotome.
  • d. Somite.
  • e. Ectoderm.

Question 6

Question
The arteries. veins and lymphatic channels develop from:
Answer
  • b. Ectoderm.
  • c. Mesoderm.
  • d. Amnion.
  • e.Endoderm.

Question 7

Question
Amniotic cavity is temporarily connected to yolk sac cavity via:
Answer
  • a. Breakdown of oral membrane.
  • b. Allantois.
  • c. Neurenteric canal.
  • d. Vitello-intestinal duct.
  • e. Breakdown of cloaca! membrane.

Question 8

Question
All the following are parts of the intraembryonic mesoderm EXCEPT:
Answer
  • a. Sclerotome
  • . b. Intermediate cell mass.
  • c. Dermatome.
  • d. Lateral plate mesoderm.
  • e. Connecting stlak.

Question 9

Question
. Mesoderm is absent in:
Answer
  • a. Somites.
  • b. Oral membrane.
  • e. Dermomyotomes.
  • c. Nephrogenic cord.
  • d. Sclerotomes.

Question 10

Question
Which of the following abnormalities of the placenta is due to an abnormality in implantation?
Answer
  • a. Battledore placenta.
  • b. Accessory placenta.
  • c. Bipartite placenta.
  • d. Placenta praevia
  • e. Tripartite placenta

Question 11

Question
As regards the twins, choose the INCORRECTstatement:
Answer
  • a. They may be monozygotic or dizygotic.
  • c. Monozygotic twins have always identical sex & blood groups.
  • b. Conjoint twins are dizygotic twins.
  • d. Dizygotic twins may have identical sex & blood groups.
  • e. Monozygotic twins may have 2 amniotic sacs.

Question 12

Question
The Intervillous spaces contain:
Answer
  • a. Foetal blood.
  • b. Maternal blood.
  • c. A mixture of foetal & maternal blood.
  • d. Blood with high C02 content.
  • e. Blood with low 02 content.

Question 13

Question
At the caudal end of the primitive streak, ectoderm & endoderm meet at the:
Answer
  • a. Notochordal canal.
  • b. Cloaca! membrane.
  • c. Buccopharyngealmembrane.
  • d. Intraembryonic coelom
  • e. None of the above.

Question 14

Question
) All of the following are derivatives of the surface ectoderm except:
Answer
  • (A) The skin and its appendages.
  • (B) The lining of all orifices of the body that open into the skin.
  • (C) The nervous tissue & the pituitary gland.
  • (D) Adrenal medulla.
  • (E) Muscles of the iris.
  • (F) Muscles of the limbs.

Question 15

Question
) All of the following anomalies might be fatal to the embryo except:
Answer
  • (A) Too long umbilical cord.
  • (B) True knot of the umbilical cord.
  • (C) False knots of the umbilical cord.
  • (D) All of the above

Question 16

Question
Regarding the amnion, all of the following are true except:
Answer
  • (A) Amniotic cavity contains watery fluid.
  • (B) Hydroamnios may be due to esophageal atresia
  • (C) Oligohydraminos may be due to renal agenesis (Failure of formation of the kidneys).
  • (D) It prevents fetal movements.

Question 17

Question
All are the contents of the umbilical cord at birth except:
Answer
  • (A) 2 Umbilical arteries.
  • (B) 1 Umbilical veins.
  • (C) Wharton’s jelly.
  • (D) Allantois & vitellointestinal duct.

Question 18

Question
Down’s syndrome is due to:
Answer
  • (A) Triasomy of the chromosome 14.
  • (B) Triasomy of the chromosome 18.
  • (C) Triasomy of the chromosome 21.
  • (D) Triasomy of the chromosome 23.

Question 19

Question
chromosomal formula of turner syndrome is
Answer
  • 44 +y
  • 45+x
  • 44+x
  • 46+x
  • 44+xxy

Question 20

Question
The visceral layer of the lateral plate mesoderm forms which of the following: (
Answer
  • A) Muscles of the limbs.
  • (B) Anterolateral body wall muscles.
  • (C) Smooth muscles of the viscera (GIT).
  • dermis of the skin
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