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 is the eustachian tube from?






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






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






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






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






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






7. Where is the mothers blood located in the placenta?






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






9. What components do the mesoderm of the branchial arches give rise to?






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






11. What embryological structure gives rise to the trabeculated part of the left and right atrium?






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






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






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






15. During what periods do the damages that cerebral palsy causes occur?






16. What does the midgut form? hindgut?






17. what invaginates to form the primitive streak?






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






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






20. Where is the decidua basalis derived from?






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






22. What surrounds the umbilical cord?






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






24. what chemo drugs can cause neural tube defects in the fetus?






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






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






27. From What embryonic layer does the brain arise?






28. From What embryonic layer do the ependymal cells arise?






29. What does the first branchial pouch create?






30. From which myotomes are muscles of the tongue derived from?






31. What do membranous interventricular septal defect cause? What does this lead to?






32. Where is the apical ectodermal ridge?






33. What type of blood do umbilical arteries carry? From where to where?






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






35. From What embryonic layer does the gut tube derivatives arise (lungs liver - pancreas - parathryroid - thyroid follicular cells - thymus)?






36. what muscles are derived from branchial arch 2?






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






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






39. Which branchial apparatus develops into the inferior parathyroids?






40. From What embryonic layer does the thyroid follicular cells arise?






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






42. What is the memranous interventricular formaen made from?






43. What does the ductus venosus shunt blood away from? What is its remnant?






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






45. From What embryonic layer does the inner arise?






46. What causes meconium discharge from the umbilicus?






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






48. From What embryonic layer does the parathyroid arise ?






49. What teratogen can cause an absence of digits amongst other things in the fetus? give an example.






50. From What embryonic layer are the pia and arachnoid from?