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






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






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






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






5. Which part of the chorionic villi can make cells?






6. What is the female remnant of processus vaginalis? male remnant?






7. From where did a branchial cleft cyst arise if it found?






8. From What embryonic layer does the retina arise?






9. What day is the chorion formed?






10. Which is more common - epispadias or hypospadias?






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






12. From What embryonic layer is the vagina from? testes? ovaries?






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






14. What two things cause VACTERL syndrome?






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






16. what other facial defect other than cyclopia is associated with holoprosencephaly?






17. What gene is produced in the zone of polarizing activity?






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






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






20. From where to Where is the foregut derivative? midgut? hindgut?






21. What artery is derived branchial (aortic) arch 2?






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






23. Does malformation occur during or after the embryonic period? is it due to an extrinsic or intrinsic disruption?






24. From What embryonic layer does a craniopharygioma arise?






25. Where is the decidua basalis derived from?






26. Where does fertilization occur?






27. What is the physiological herniation that occurs at the 6th week - what herniates out of the umbilical ring? when it comes back in the 10th week - What does it rotate around?






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






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






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






31. What is the leading cause of birth defects in the US? what else is this perpetrator the leading cause of?






32. What surrounds the umbilical cord?






33. When does hcG get secreted? What does it do?up until when ?






34. From what aortic arch does the stapedial artery arise? the hyoid?






35. What are the aspects of fetal alcohol syndrome?






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






37. From What embryonic layer do CNS neurons arise?






38. Where is the most common ectopic thyroid tissue?






39. Which branchial apparatus makes the external auditory meatus?






40. At what week does the fetus look like a baby?






41. From What embryonic layer does the adenohypophysis arise?






42. From What embryonic layer do chromaffin cells arise?






43. From which branchial derivative does the anterior 2/3 of the tongue develop?






44. What three components make up the branchial/pharyngeal apparatus?






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






46. From What embryonic layer are the cardiovascular - lymphatics and blood from?






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






48. What is hypoplasia? is primordial tissue present?






49. In what chromosomal disorder is horseshoe kidney commonly seen? what poles of the kidneys fuse?






50. what structures are the derivatives of the neural crest cells in branchial arches?