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 is more common - epispadias or hypospadias?






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






3. What causes tetralogy of Fallot?






4. What secretes hCG?






5. What embryological structure gives rise to the coronary sinus?






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






7. From What embryonic layer are the cardiovascular - lymphatics and blood from?






8. When does the neural tube form and From what does it form?






9. Blood coming in the umbilical vein is ____ saturated






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






11. What teratogens can cause CN VIII toxicity in the fetus?






12. From What embryonic layer does bone arise ?






13. What is the 'fetal period'- ie When is it?






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






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






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






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






18. what separates the atria from the ventricles?






19. What teratogens can cause renal damage in the fetus?






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






21. What teratogens can cause discolored teeth?






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






23. What are two common findings in pyloric stenosis?






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






25. Name a syndrome cleft palate is often seen in






26. From what does bicornuate uterus arise? What is it associated with?






27. From What embryonic layer does the neurohypophysis arise?






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






29. During what months is the fetus most susceptible to teratogens? What trimester?






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






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






32. What is the most common autopsy finding in brains of premature infants?






33. What is the memranous interventricular formaen made from?






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






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






36. which posterior fossa malformation results in aqueductal stenosis and hydrocephaly? what other spinal cord lesion does this malformation present with?






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






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






39. What type of radiation is teratogenic ?






40. What arises from the fourth aortic arch?






41. what chemo drugs can cause neural tube defects in the fetus?






42. What day is the amnion formed?






43. From What embryonic layer does the olfactory epithelium arise?






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






45. What does the RET gene encode? what neoplasias is it associated with?






46. From what germ layer does the primitive heart tube arise?






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






48. what invaginates to form the primitive streak?






49. Which branchial apparatus develops into the inferior parathyroids?






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