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 region of the brain does the fourth ventricle form?






2. What type of - amnios does bilateral agenesis form? What three symptoms does this cause?






3. From What embryonic layer does the oligodendrocytes arise?






4. What is the fate of the cervical sinuses that develop from the 2nd -4th branchial grooves?






5. When is most important to take folic acid to prevent neural tube defects?






6. Which branchial apparatus develops into the thymus?






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






8. From what region do the thalami form?






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






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






11. Septum primum (patent foramen oval) caused by excessive resorption of...






12. From where does the medulla form?






13. How does annular pancreas present in children?






14. What is the memranous interventricular formaen made from?






15. what closes the interventricular foramen?






16. What is contained in the umbilical cord?






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






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






19. which tracts are damaged first in syringomelia? What tract is preserved?






20. What does the foramen ovale shunt blood from - to where? What is its remnant?






21. Which branchial apparatus makes the external auditory meatus?






22. From What embryonic layer is the eustachian tube from?






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






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






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






26. From where does the prostate develop? seminal vesicles? fallopian tube? lower 2/3 of the vagina? ejaculatory duct? epididymis? uterus? upper 1/3 of the vagina?






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






28. What is a syrinx? Where is it found in syringomelia? What is it associated with?






29. From What embryonic layer does a craniopharygioma arise?






30. The spinal cord is made from...






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






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






33. what separates the atria from the ventricles?






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






35. From what region of the brain does the lateral ventricles and the 3rd ventricle form?






36. From What embryonic layer do chromaffin cells arise?






37. Blood coming in the umbilical vein is ____ saturated






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






39. Before birth - blood entering the LA is less than...






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






41. What is annular pancreas associated with in infants?






42. What causes tetralogy of Fallot?






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






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






45. what closes the ductus arteriousus?






46. what muscles are derived from branchial arch 3?






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






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






49. What effect does warfarin have on the fetus?






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