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






2. what bone/cartilage and nerves are derived from branchial arch 2?






3. Monochorionic - ___________ twins are conjoined






4. What causes the decrease in Right atrial pressure to close the fossa ovale?






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






6. What day is the amnion formed?






7. What are the two types of posterior fossa malformations? which one results in a hindbrain crowding? and which results in an enlarged posterior fossa? which one is associated with syringomelia?






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






9. To what germ layer does the branchial pouches correlate to?






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






11. What day is the chorion formed?






12. what muscles are derived from branchial arch 2?






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






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






15. What is perinauds syndrome?






16. From What embryonic layer does the brain arise?






17. Blood coming in the umbilical vein is ____ saturated






18. From which myotomes are muscles of the tongue derived from?






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






20. In what chromosomal disorder is horseshoe kidney commonly seen? what poles of the kidneys fuse?






21. what muscles are derived from branchial arch 6? CN?






22. Where does fertilization occur?






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






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






25. what week do the genitalia start to have male/female characteristics? What trimester is that?






26. The spinal cord is made from...






27. What is the notochord? What does the notochord later become?






28. what other facial defect other than cyclopia is associated with holoprosencephaly?






29. What are two common findings in pyloric stenosis?






30. What is germinal matrix hemorrhage associated with?






31. From What embryonic layer are the melanocytes from?






32. The inner layer of the chorionic villi...






33. From What embryonic lare are the odontoblasts from?






34. Which CN allows for taste and sensation in the posterior 1/3 of the tongue? how about the very back ?






35. Where is the most common ectopic thyroid tissue?






36. Gastroschisis is extrusion of abdominal contents out of abdominal folds ___________ by peritoneum






37. From where is the pancreas derived? the spleen?






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






39. Only _______________________________ are associated with neural tube defects






40. From what region do the thalami form?






41. From What embryonic layer does the neurohypophysis arise?






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






43. What part of the vagina does the mullerian duct form? Where does the rest come from?






44. What embryological structure gives rise to the trabeculated part of the left and right atrium?






45. What does the ureteric bud interact with and What does it induce it to become?






46. What trisomy is associated with holoprosencephaly? What teratogen?






47. Name a syndrome cleft palate is often seen in






48. From where does the medulla form?






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






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