Test
general embryology quiz for block 2 exam Dr.Youssef Shoukry
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Preguntas del test (20)
1The primitive streak develops in which layer of embryonic disc?
- Aa. Epiblast.
- Bb. Hypoblast.
- Cc. Mesoderm.
- Dd. Endoderm.
- Ee. Notochord.
2. Which of the following is derived from somites:
- Aa. Dermis.
- Bb. Ganglia.
- Cc. Pleura.
- Dd. Lungs.
- Ee. Kidneys.
3An umbilical cord attached to the margin of placenta is called:
- Aa. Velamentous insertion of cord.
- Bb. Placenta accreta.
- Cc. Battledore placenta.
- Dd. Succenturiata placenta.
- Ee. False cord knot.
4The number of somlres during the 22nd day is:
- Aa. Two.
- Bb. Four.
- Cc. Seven.
- Dd. Ten.
- Ee. Thirteen.
5Nucleus pulposus of intervertebral disc develops from the:
- Aa. Neural crest.
- Bb. Notochord.
- Cc. Sclerotome.
- Dd. Somite.
- Ee. Ectoderm.
6The arteries. veins and lymphatic channels develop from:
- Ab. Ectoderm.
- Bc. Mesoderm.
- Cd. Amnion.
- De.Endoderm.
7Amniotic cavity is temporarily connected to yolk sac cavity via:
- Aa. Breakdown of oral membrane.
- Bb. Allantois.
- Cc. Neurenteric canal.
- Dd. Vitello-intestinal duct.
- Ee. Breakdown of cloaca! membrane.
8All the following are parts of the intraembryonic mesoderm EXCEPT:
- Aa. Sclerotome
- B.
b. Intermediate cell mass. - Cc. Dermatome.
- Dd. Lateral plate mesoderm.
- Ee. Connecting stlak.
9. Mesoderm is absent in:
- Aa. Somites.
- Bb. Oral membrane.
- Ce. Dermomyotomes.
- Dc. Nephrogenic cord.
- Ed. Sclerotomes.
10Which of the following abnormalities of the placenta is due to an abnormality in implantation?
- Aa. Battledore placenta.
- Bb. Accessory placenta.
- Cc. Bipartite placenta.
- Dd. Placenta praevia
- Ee. Tripartite placenta
11As regards the twins, choose the INCORRECTstatement:
- Aa. They may be monozygotic or dizygotic.
- Bc. Monozygotic twins have always identical sex & blood groups.
- Cb. Conjoint twins are dizygotic twins.
- Dd. Dizygotic twins may have identical sex & blood groups.
- Ee. Monozygotic twins may have 2 amniotic sacs.
12The Intervillous spaces contain:
- Aa. Foetal blood.
- Bb. Maternal blood.
- Cc. A mixture of foetal & maternal blood.
- Dd. Blood with high C02 content.
- Ee. Blood with low 02 content.
13At the caudal end of the primitive streak, ectoderm & endoderm meet at the:
- Aa. Notochordal canal.
- Bb. Cloaca! membrane.
- Cc. Buccopharyngealmembrane.
- Dd. Intraembryonic coelom
- Ee. None of the above.
14) All of the following are derivatives of the surface ectoderm except:
- A(A) The skin and its appendages.
- B(B) The lining of all orifices of the body that open into the skin.
- C(C) The nervous tissue & the pituitary gland.
- D(D) Adrenal medulla.
- E(E) Muscles of the iris.
- F(F) Muscles of the limbs.
15) All of the following anomalies might be fatal to the embryo except:
- A(A) Too long umbilical cord.
- B(B) True knot of the umbilical cord.
- C(C) False knots of the umbilical cord.
- D(D) All of the above
16Regarding the amnion, all of the following are true except:
- A(A) Amniotic cavity contains watery fluid.
- B(B) Hydroamnios may be due to esophageal atresia
- C(C) Oligohydraminos may be due to renal agenesis (Failure of formation of the kidneys).
- D(D) It prevents fetal movements.
17All are the contents of the umbilical cord at birth except:
- A(A) 2 Umbilical arteries.
- B(B) 1 Umbilical veins.
- C(C) Wharton’s jelly.
- D(D) Allantois & vitellointestinal duct.
18Down’s syndrome is due to:
- A(A) Triasomy of the chromosome 14.
- B(B) Triasomy of the chromosome 18.
- C(C) Triasomy of the chromosome 21.
- D(D) Triasomy of the chromosome 23.
19chromosomal formula of turner syndrome is
- A44 +y
- B45+x
- C44+x
- D46+x
- E44+xxy
20The visceral layer of the lateral plate mesoderm forms which of the following:
(- AA) Muscles of the limbs.
- B(B) Anterolateral body wall muscles.
- C(C) Smooth muscles of the viscera (GIT).
- Ddermis of the skin
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- Test sobre general embryology quiz for block 2 exam Dr.Youssef Shoukry, creado por youssef shoukry el 17/11/2018.
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