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 role does the placenta have?






2. What happens in pancreas divisum? what results?






3. What teratogen can cause inhibition of intestinal folate absorption and thus neural tube defects?






4. What two cavities also form during the second week?






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






6. From what branchial derivative do the parafollicular cells arise?






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






8. From What embryonic layer do the ANS arise?






9. From What embryonic layer is the bladder and urethra from?






10. What causes the degeneration of the spinal cord in syringomelia?






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






12. What causes a patent foramen ovale?






13. From what arches are the neural crest cells that form the aorticpulmonary septum derived?






14. From where is the allantois formed? During what week?






15. What embryological structure gives rise to the smooth part of the right atrium?






16. What do the arches of the branchial apparatus correlate to?






17. By what week is the neural tube supposed to be closed? when did it start forming?






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






19. What are the aspects of fetal alcohol syndrome?






20. What is the allantois become? What is this duct connected to ( on both ends)?






21. What is the most common subtype of tracheoesophageal fistula? name some symptoms (hint: O2 levels - feeding - stomach on CXR - - amnios? - NG tube? - respiratory infection? )






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






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






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






25. What is perinauds syndrome?






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






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






28. What part of the gut rotates around the SMA? and At what point?






29. What is DiGeorge syndrome and What does it result in?






30. What causes a large posterior fossa in a dandy walker malformation? What is found in this fossa?






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






32. What is the mcc of renovascular hypertension in children? What does this predispose to?






33. What does DHT turn the urogenital sinus into? estrogen?






34. What embryologic structure provides the aorticpulmonary septum?






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






36. Name a syndrome cleft palate is often seen in






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






38. Where is the FGF gene produced? What is it responsible for - How does it do this?






39. What does the first branchial pouch create?






40. Cleft lip is a failure of fusion of ________ and ______.






41. What is the difference between agenesis and aplasia?






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






43. What three layers form during gastrulation? From What do they form? and what week does gastrulation occur?






44. Which branchial apparatus makes the external auditory meatus?






45. Where is Wnt 7 gene produced?






46. what muscles are derived from branchial arch 4? CN?






47. From What embryonic layer does connective tissue and muscle arise?






48. What is the prochordal plate?






49. From where does pons form from? what else forms from there?






50. When does organogenesis occur?