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 embryonic layer does the pineal gland arise?






2. How do you differentiate a thyroglossal duct cyst from a persistent cervical sinus?






3. When does the notochord form? and When does the neural plate form?






4. During what week do the limbs begin to form?






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






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






7. For what reason do hypospadias need to be fixed?






8. what happens in hydrocele?






9. Cleft palate is a failure of formation of the...






10. From where does the signal come from to suppress paramesonephric ducts? what stimulates development of the mesonephric ducts?






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






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






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






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






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






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






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






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






19. What is the effect of teratogens after week 8?






20. Which part of pancreas contribute to body? tail? isthmus? accessory pancreatic duct?






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






22. What is a zygote?






23. What layer is the epiblast? hypoblast?






24. What part of the fetal comp of the placenta secretes hCG? is this part on the inner or outer layer of the chorionic villi? does it make cells?






25. What are the neural crest cells and where do they come form? where do they go?






26. What is the prochordal plate?






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






28. From What do the embryoblast and trophoblast form from? What does the embryoblast split into? the trophoblast?






29. How do adults with annular pancreas present? and At What age?






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






31. What germ layer correlates with the branchial pouches?






32. What surrounds the umbilical cord?






33. What part of the vagina does the mullerian duct form? Where does the rest come from?






34. is epispadias or hypospadias associated with exstrophy of the bladder?






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






36. Which branchial apparatus makes the external auditory meatus?






37. what bone/cartilage and nerves are derived from branchial arch 1?






38. What are markers for neural tube defects in the amniotic cavity? CSF?






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






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






41. From where does the permanent kidney for? is it most caudal or most cranial?






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






43. What two things cause VACTERL syndrome?






44. what else is the caudal regression known as? What two teratogen can cause this in the fetus?






45. Where is the most common ectopic thyroid tissue?






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






47. What embryologic structure provides the aorticpulmonary septum?






48. Most myelomeningoceles present in the _______ region






49. What happens in pancreas divisum? what results?






50. Monochorionic - ___________ twins are conjoined