Test your basic knowledge |

USMLE Embryo

Subjects : health-sciences, usmle
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Which branchial derivative accounts for the posterior 2/3 of the tongue?






2. What is DiGeorge syndrome and What does it result in?






3. What causes persistent Truncus Arteriosus? What does it result in?






4. By what week is there fetal movement?






5. From What embryonic layer does the retina arise?






6. What is omphalocele? In What trisomies is it seen?






7. From what region does the midbrain form from?






8. Where is the decidua basalis derived from?






9. What teratogen can cause inhibition of intestinal folate absorption and thus neural tube defects?






10. From where did a branchial cleft cyst arise if it found?






11. What separated myometrium of the uterus from the blastocyst?






12. What gene is produced in the zone of polarizing activity?






13. What does the midgut form? hindgut?






14. What artery is derived branchial (aortic) arch 6?






15. From What embryonic layer does the neurohypophysis arise?






16. How is amniontic fluid excreted? How is amniotic fluid resorped?






17. what separates the atria from the ventricles?






18. what structures are the derivatives of the neural crest cells in branchial arches?






19. What layer is the epiblast? hypoblast?






20. From What embryonic layer is the vagina from? testes? ovaries?






21. What is the kidney that functions at the interim kidney in the 1st trimester? What does it later contribute to?






22. How do AV canals form?






23. From What embryonic layer are the pia and arachnoid from?






24. What embryologic structure provides the aorticpulmonary septum?






25. What teratogen can cause IUGR and ADHD in a fetus? what else can this teratogen cause?






26. What does the vitelline duct connect? What is it also known as? when should it obliterate?






27. Cleft lip is a failure of fusion of ________ and ______.






28. From what region of the brain does the lateral ventricles and the 3rd ventricle form?






29. From What embryonic layer do the ependymal cells arise?






30. From What embryonic layer are the dorsal root and celiac ganglion from?






31. What germ layer correlates with the branchial pouches?






32. What are the three results of having pathology in the aorticopulmonary septum?






33. What is the most common subtype of tracheoesophageal fistula? name some symptoms (hint: O2 levels - feeding - stomach on CXR - - amnios? - NG tube? - respiratory infection? )






34. Which CN accounts for the anterior 2/3 of the tongues sensation and pain? how about taste?






35. What is the mnueomonic for the mesodermal defects? What does it stand for?






36. What day is the chorion formed?






37. In both meningocele and myelomeningocele the dura...






38. At what week does the fetus look like a baby?






39. What does DHT turn the labioscrotal swelling into? estrogen?






40. What is the fate of the cervical sinuses that develop from the 2nd -4th branchial grooves?






41. Which branchial arch derivative is obliterated?






42. What role does the placenta have?






43. The notochord is...






44. From where does the ureteric bud arise? What does it give rise to?






45. From what branchial derivative do the parafollicular cells arise?






46. What causes urine discharge from the umbilicus?






47. what muscles are derived from branchial arch 1?






48. How does annular pancreas present in children?






49. Where is erythropoeisis in the weeks 3-8 of fetal development? Where does it occur after that? until when?






50. From What embryonic layer does bone arise ?