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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 do CNS neurons arise?






2. What is the most common autopsy finding in brains of premature infants?






3. What embryologic structure provides the aorticpulmonary septum?






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






5. What is the mnueomonic for the mesodermal defects? What does it stand for?






6. From what region does the cerebral hemisphere form?






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






8. What is the prochordal plate?






9. Pyloric stenosis is characterized by _____________ of muscularis externis in the sphincter






10. What day is the chorion formed?






11. What teratogen can cause IUGR and ADHD in a fetus? what else can this teratogen cause?






12. In anencephaly you see...






13. What is the primitive streak? From what layer does it form?






14. From what arches are the neural crest cells that form the aorticpulmonary septum derived?






15. Name two endocardial cushion defects.






16. From what region do the thalami form?






17. Where is the FGF gene produced? What is it responsible for - How does it do this?






18. Which branchial apparatus develops into the superior parathyroids?






19. What does the first cleft/groove of the branchial apparatus develop into?






20. 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?






21. From What embryonic layer does the spinal cord arise?






22. How does annular pancreas present in children?






23. The notochord is...






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






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






26. From What embryonic layer is aorticopulmonary septum from ?






27. what closes the ductus arteriousus?






28. From What embryonic layer are the melanocytes from?






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






30. From What embryonic layer do chromaffin cells arise?






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






32. what bone/cartilage and nerves are derived from branchial arch 2?






33. From What embryonic layer does the olfactory epithelium arise?






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






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






36. What is the homeobox gene responsible in developing? (What axis)






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






38. What is germinal matrix hemorrhage associated with?






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






40. What role does the placenta have?






41. what muscles are derived from branchial arch 1?






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






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






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






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






46. From where does the ureteric bud arise? What does it give rise to?






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






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






49. What are the two components of the fetal component of the placenta?






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







Sorry!:) No result found.

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