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 causes meconium discharge from the umbilicus?






2. What embryologic structure provides the aorticpulmonary septum?






3. What is DiGeorge syndrome and What does it result in?






4. What does DHT turn the genital tubercle into? estrogen?






5. What day is the amnion formed?






6. What components do the neural crest cells of the branchial arches give rise to?






7. What two cavities also form during the second week?






8. What axis does the alar plate form? what neural system does it become?






9. Where does fertilization occur?






10. What axis is Wnt 7 responsible for developing?






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






12. What does the ductus arteriosus shunt blood away from - to where? What is its remnant?






13. Which cranial nerve innervates the motor function of the tongue?






14. What causes tetralogy of Fallot?






15. From where does the medulla form?






16. what muscles are derived from branchial arch 6? CN?






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






18. From What embryonic layer does the epidermis arise?






19. 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?






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






21. What is duodenal atresia usually due to? What trisomy is it most often seen in?






22. In anencephaly you see...






23. From What embryonic layer does the neurohypophysis arise?






24. How does annular pancreas present in children?






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






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






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






28. Which branchial apparatus develops into the superior parathyroids?






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






30. When does organogenesis occur?






31. What does DHT turn the labioscrotal swelling into? estrogen?






32. what muscles are derived from branchial arch 2?






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






34. What are the aspects of fetal alcohol syndrome?






35. On what side is the abnormal opening in epispadias? What causes it?






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






37. What does the maternal component of the placenta provide? Where is it derived from?






38. which posterior fossa malformation results in aqueductal stenosis and hydrocephaly? what other spinal cord lesion does this malformation present with?






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






40. What arises from the fourth aortic arch?






41. _____________is common in 1st born males






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






43. what results if they dont? What can increase the risks of this?






44. what drug is used to help close a PDA? what else does this drug treat?






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






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






47. What is the female remnant of the gubernaculum? male remnant?






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






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






50. From What embryonic layer is aorticopulmonary septum from ?