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 gene is produced in the zone of polarizing activity?






2. What does the first branchial pouch create?






3. What teratogens can cause discolored teeth?






4. From What embryonic layer is aorticopulmonary septum from ?






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






6. From What embryonic layer does the oligodendrocytes arise?






7. From What embryonic layer do chromaffin cells arise?






8. From What embryonic layer does the lens of the eye arise?






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






10. What is used to keep the PDA open?






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






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






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






14. Which branchial derivative accounts for the sensation and taste in the posterior 2/3 of the tongue? how about the very back?






15. From what are the umbilical arteries and veins derived from?






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






17. Which branchial apparatus develops into the inferior parathyroids?






18. From What embryonic layer does the brain arise?






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






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






21. what muscles are derived from branchial arch 3?






22. WithIn what week does gastrulation occur? What is gastrulation?






23. What axis is Wnt 7 responsible for developing?






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






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






26. What can vit A in excess cause in the fetus?






27. Where is the most common ectopic thyroid tissue?






28. The spleen is ____________ in origin and supplied by a foregut artery






29. From What embryonic lare are the odontoblasts from?






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






31. What are the clinical symptoms that present with syringomelia?






32. Where does fertilization occur?






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






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






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






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






37. What do the groove/clefts of the branchial apparatus correlate to?






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






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






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






41. When does the blastocyst split into two disks? What is this disk called? What are the two germ layers called?






42. From what aortic arch does the first part of the maxillary artery arise?






43. During what week does the heart begin to beat?






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






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






46. What separated myometrium of the uterus from the blastocyst?






47. How many umbilical arteries are there? How many umbilical veins?






48. What do the 2nd through 4th clefts of the branchial apparatus correlate to?






49. What embryologic structure gives rise to the smooth outflow tracts of the ventricles? what else does it give rise to?






50. failure to close of what fold results in sternal defects? omphalocele? gastrochisis? bladder extrosphy?