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






2. From where does the prostate develop? seminal vesicles? fallopian tube? lower 2/3 of the vagina? ejaculatory duct? epididymis? uterus? upper 1/3 of the vagina?






3. Which branchial derivative accounts for taste in the ant 2/3?






4. Where is the mothers blood located in the placenta?






5. Cleft palate is a failure of fusion of the lateral palatine processes - the nasal septum and or the ________?






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






7. What can vit A in excess cause in the fetus?






8. What is duodenal atresia usually due to? What trisomy is it most often seen in?






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






10. From What embryonic layer does the parathyroid arise ?






11. From What embryonic lare are the odontoblasts from?






12. what muscles are derived from branchial arch 1?






13. Which branchial apparatus develops into the inferior parathyroids?






14. what closes the ductus arteriousus?






15. From What embryonic layer does the neurohypophysis arise?






16. WithIn what week does gastrulation occur? What is gastrulation?






17. What is congenital pharyngocutaneous fistula? and How does it occur?






18. _____________is common in 1st born males






19. Before birth - blood entering the LA is less than...






20. What is the Eisenmeger complex?






21. The spleen is ____________ in origin and supplied by a foregut artery






22. What is the primitive streak? From what layer does it form?






23. How do you differentiate a thyroglossal duct cyst from a persistent cervical sinus?






24. What are the two walls of the prosencephalon and What do they become?






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






26. What components do the mesoderm of the branchial arches give rise to?






27. What is an example of a syndrome that can cause abnormal neural crest migration and thus CV abnormalities?






28. When is most important to take folic acid to prevent neural tube defects?






29. Which branchial derivative accounts for the posterior 2/3 of the tongue?






30. Pyloric stenosis is characterized by _____________ of muscularis externis in the sphincter






31. what bone/cartilage and nerves are derived from branchial arch 3?






32. In anencephaly you see...






33. Where is the apical ectodermal ridge?






34. What causes tetralogy of Fallot?






35. What is perinauds syndrome?






36. With the first breath the infant take - pulmonary vasculature resistance _______ which causes an increase in left atrial pressure






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






38. what closes the interventricular foramen?






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






40. What layer is the epiblast? hypoblast?






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






42. What is the effect of teratogens before week 3?






43. From What embryonic layer does the inner arise?






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






45. What is the prochordal plate?






46. What are the two components of the placenta? From What do they form? which one secreted hcG?






47. What teratogens can cause flipper limbs (limb defects)? What is this drug used for?






48. From what region does the cerebral hemisphere form?






49. What arises from the fourth aortic arch?






50. From What embryonic layer does bone of the skulls arise?