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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. From What embryonic layer does the pineal gland arise?






2. What artery is derived branchial (aortic) arch 3?






3. What artery is derived branchial (aortic) arch 4?






4. From What embryonic layer does the epithelial linings of the oral cavity arise?






5. What causes a patent foramen ovale?






6. From What embryonic layer are the schwann cells from ?






7. From What embryonic layer does bone arise ?






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






9. What does the mullerian duct develop into? wollffian?






10. What does the foramen ovale shunt blood from - to where? What is its remnant?






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






12. Which branchial apparatus makes the external auditory meatus?






13. What does the midgut form? hindgut?






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






15. What separates the ant 1/3 and post 2/3 of tongue?






16. Cleft lip is a failure of formation of the...






17. What produces testis determining factor? what cells are produced from this? and What do they secrete? does this result in?






18. What does DHT turn the urogenital folds into? estrogen?






19. What is the leading cause of birth defects in the US? what else is this perpetrator the leading cause of?






20. From what aortic arch does the stapedial artery arise? the hyoid?






21. What are the neural crest cells and where do they come form? where do they go?






22. what muscles are derived from branchial arch 2?






23. What does the first branchial pouch create?






24. Which arches form the posterior 1/3 of the tongue?






25. How does annular pancreas present in children?






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






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






28. What is the neural plate and From what does it form?






29. From what region does the midbrain form from?






30. Which parts of the pancreas contribute to the head - uncinate process and main pancreatic duct?






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






32. What artery is derived branchial (aortic) arch 2?






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






34. What is germinal matrix hemorrhage associated with?






35. During what week do the limbs begin to form?






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






37. What is the difference between agenesis and aplasia?






38. What causes the increase in left atrial pressure to close the fossa ovale?






39. What type of blood do umbilical arteries carry? From where to where?






40. What causes the obstruction in pyloric stenosis? treatment?






41. What axis does the basal plate form? what neural system does it become?






42. What teratogen can cause an absence of digits amongst other things in the fetus? give an example.






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






44. By when are the neuropores supposed to fuse?






45. What teratogens can cause discolored teeth?






46. From What embryonic layer do the ANS arise?






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






48. Where is Wnt 7 gene produced?






49. From What embryonic layer do chromaffin cells arise?






50. What is used to keep the PDA open?







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