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. What layer is the epiblast? hypoblast?






2. From What embryonic layer does the epidermis arise?






3. From What embryonic layer does the gut tube epithelium arise?






4. which tracts are damaged first in syringomelia? What tract is preserved?






5. When does hCG secretion take place? with what event?






6. What type of blood do umbilical veins carry? From where to where?






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






8. What embryologic structure gives rise to the smooth outflow tracts of the ventricles? what else does it give rise to?






9. How many components are there to the placenta? What are they called?






10. What causes the transposition of the great vessels? What does it result in?






11. What is holoprosencephaly? what eye disorder does it result in?






12. From What embryonic layer does the spinal cord arise?






13. Name a syndrome cleft palate is often seen in






14. What is an arnold chiari II malformation? through what hole does it herniate?






15. What axis is Wnt 7 responsible for developing?






16. Which cranial nerve innervates the motor function of the tongue?






17. What does the maternal component of the placenta provide? Where is it derived from?






18. Which branchial arch derivative is obliterated?






19. What are the two components of the fetal component of the placenta?






20. From what region of the brain does the aqueduct form?






21. What is the prochordal plate?






22. What is the female remnant of the gubernaculum? male remnant?






23. What congenital abnormality forms a 'double bubble' on xray?






24. From What embryonic layer does a craniopharygioma arise?






25. Which branchial apparatus develops into the superior parathyroids?






26. From where does the signal come from to suppress paramesonephric ducts? what stimulates development of the mesonephric ducts?






27. Which is more common - epispadias or hypospadias?






28. What is the initial step to interventricular septum development? is it complete?






29. What does the ductus arteriosus shunt blood away from - to where? What is its remnant?






30. From what aortic arch does the common carotid artery arise? what else arises from this arch?






31. From What embryonic layer does the sensory organs of the ear arise?






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






33. which teratogen can cause Ebsteins anomaly in the fetus?






34. Where is the apical ectodermal ridge?






35. What is germinal matrix hemorrhage associated with?






36. From What do the embryoblast and trophoblast form from? What does the embryoblast split into? the trophoblast?






37. what closes the interventricular foramen?






38. What components do the neural crest cells of the branchial arches give rise to?






39. What is meckel's diverticulum? What is it associated with? What does that cause?






40. What is annular pancreas associated with in infants?






41. The spinal cord is made from...






42. From where to Where is the foregut derivative? midgut? hindgut?






43. what bone/cartilage are derived from branchial arch 4-6?






44. From What embryonic layer does the skin dermis arise?






45. Where is sonic hedgehog gene produced? What axis is it responsible in patterning?






46. What connects the thyroid to the tongue? when happens if it doesnt obliterate?






47. What do the groove/clefts of the branchial apparatus correlate to?






48. what junction is the last to canalize? what implications does this have down the line?






49. From where do the three different kidneys come from? Which is the earliest one? is it located most cranially or caudally?






50. What does the ductus venosus shunt blood away from? What is its remnant?