16052358
Description
Quiz by youssef shoukry, updated more than 1 year ago
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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
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a. Epiblast.
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b. Hypoblast.
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c. Mesoderm.
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d. Endoderm.
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e. Notochord.
Question 2
Question
. Which of the following is derived from somites:
Answer
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a. Dermis.
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b. Ganglia.
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c. Pleura.
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d. Lungs.
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e. Kidneys.
Question 3
Question
An umbilical cord attached to the margin of placenta is called:
Answer
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a. Velamentous insertion of cord.
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b. Placenta accreta.
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c. Battledore placenta.
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d. Succenturiata placenta.
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e. False cord knot.
Question 4
Question
The number of somlres during the 22nd day is:
Answer
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a. Two.
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b. Four.
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c. Seven.
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d. Ten.
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e. Thirteen.
Question 5
Question
Nucleus pulposus of intervertebral disc develops from the:
Answer
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a. Neural crest.
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b. Notochord.
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c. Sclerotome.
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d. Somite.
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e. Ectoderm.
Question 6
Question
The arteries. veins and lymphatic channels develop from:
Answer
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b. Ectoderm.
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c. Mesoderm.
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d. Amnion.
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e.Endoderm.
Question 7
Question
Amniotic cavity is temporarily connected to yolk sac cavity via:
Answer
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a. Breakdown of oral membrane.
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b. Allantois.
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c. Neurenteric canal.
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d. Vitello-intestinal duct.
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e. Breakdown of cloaca! membrane.
Question 8
Question
All the following are parts of the intraembryonic mesoderm EXCEPT:
Answer
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a. Sclerotome
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. b. Intermediate cell mass.
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c. Dermatome.
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d. Lateral plate mesoderm.
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e. Connecting stlak.
Question 9
Question
. Mesoderm is absent in:
Answer
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a. Somites.
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b. Oral membrane.
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e. Dermomyotomes.
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c. Nephrogenic cord.
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d. Sclerotomes.
Question 10
Question
Which of the following abnormalities of the placenta is due to an abnormality in implantation?
Answer
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a. Battledore placenta.
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b. Accessory placenta.
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c. Bipartite placenta.
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d. Placenta praevia
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e. Tripartite placenta
Question 11
Question
As regards the twins, choose the INCORRECTstatement:
Answer
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a. They may be monozygotic or dizygotic.
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c. Monozygotic twins have always identical sex & blood groups.
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b. Conjoint twins are dizygotic twins.
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d. Dizygotic twins may have identical sex & blood groups.
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e. Monozygotic twins may have 2 amniotic sacs.
Question 12
Question
The Intervillous spaces contain:
Answer
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a. Foetal blood.
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b. Maternal blood.
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c. A mixture of foetal & maternal blood.
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d. Blood with high C02 content.
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e. Blood with low 02 content.
Question 13
Question
At the caudal end of the primitive streak, ectoderm & endoderm meet at the:
Answer
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a. Notochordal canal.
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b. Cloaca! membrane.
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c. Buccopharyngealmembrane.
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d. Intraembryonic coelom
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e. None of the above.
Question 14
Question
) All of the following are derivatives of the surface ectoderm except:
Answer
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(A) The skin and its appendages.
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(B) The lining of all orifices of the body that open into the skin.
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(C) The nervous tissue & the pituitary gland.
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(D) Adrenal medulla.
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(E) Muscles of the iris.
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(F) Muscles of the limbs.
Question 15
Question
) All of the following anomalies might be fatal to the embryo except:
Answer
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(A) Too long umbilical cord.
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(B) True knot of the umbilical cord.
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(C) False knots of the umbilical cord.
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(D) All of the above
Question 16
Question
Regarding the amnion, all of the following are true except:
Answer
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(A) Amniotic cavity contains watery fluid.
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(B) Hydroamnios may be due to esophageal atresia
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(C) Oligohydraminos may be due to renal agenesis (Failure of formation of the kidneys).
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(D) It prevents fetal movements.
Question 17
Question
All are the contents of the umbilical cord at birth except:
Answer
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(A) 2 Umbilical arteries.
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(B) 1 Umbilical veins.
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(C) Wharton’s jelly.
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(D) Allantois & vitellointestinal duct.
Question 18
Question
Down’s syndrome is due to:
Answer
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(A) Triasomy of the chromosome 14.
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(B) Triasomy of the chromosome 18.
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(C) Triasomy of the chromosome 21.
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(D) Triasomy of the chromosome 23.
Question 19
Question
chromosomal formula of turner syndrome is
Answer
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44 +y
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45+x
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44+x
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46+x
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44+xxy
Question 20
Question
The visceral layer of the lateral plate mesoderm forms which of the following:
(
Answer
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A) Muscles of the limbs.
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(B) Anterolateral body wall muscles.
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(C) Smooth muscles of the viscera (GIT).
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dermis of the skin
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