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






2. From which germlayer does the thyroid develop?? From what structure exactly?






3. From What embryonic layer does the skin dermis arise?






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






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






6. What embryonic structure gives rise to the ascending aorta? what else does it give rise to?






7. From What embryonic layer do the parafollicular cells of the thyroid arise?






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






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






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






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






12. what results if they dont? What can increase the risks of this?






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






14. What is holoprosencephaly? what eye disorder does it result in?






15. What role does the placenta have?






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






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






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






19. What type of radiation is teratogenic ?






20. In order to survive tricuspid atresia - What do you need?






21. What causes persistent Truncus Arteriosus? What does it result in?






22. what separates the atria from the ventricles?






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






24. what muscles are derived from branchial arch 3?






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






26. From What embryonic layer are the serous linings of the body cavities from? for ex - peritoneum?






27. what bone/cartilage are derived from branchial arch 4-6?






28. What are the three regions of the brain (in order of cranial to caudal)?






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






30. Where is the most common ectopic thyroid tissue?






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






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






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






34. Where is erythropoeisis in the weeks 3-8 of fetal development? Where does it occur after that? until when?






35. What hormone is hcG structurally similar too?






36. What axis is Wnt 7 responsible for developing?






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. From where does the medulla form?






40. What artery is derived branchial (aortic) arch 1?






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






42. Other than not having a brain - what else is a symptom of anencephaly? why? hint: think about amniotic fluid






43. Which branchial apparatus derivative makes the tympanic membrane of the ear?






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






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






46. Which cranial nerve innervates the motor function of the tongue?






47. From What embryonic layer does the gut tube epithelium arise?






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






49. Where is the apical ectodermal ridge?






50. What type of blood do umbilical veins carry? From where to where?






Can you answer 50 questions in 15 minutes?



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