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 is perinauds syndrome?






2. What causes the transposition of the great vessels? What does it result in?






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






4. what bone/cartilage are derived from branchial arch 4-6?






5. What is used to keep the PDA open?






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






7. Where does the blastocyst implant in the uterus? During what phase of the menstrual cycle?






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






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






10. What causes the increase in left atrial pressure to close the fossa ovale?






11. In anencephaly you see...






12. The spinal cord is made from...






13. What causes the degeneration of the spinal cord in syringomelia?






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






15. What does the mullerian duct develop into? wollffian?






16. How is amniontic fluid excreted? How is amniotic fluid resorped?






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






18. What is jejunal - ileal - colonic atresia usually due to? What do you see on x ray?






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






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






21. in hypospadias - on which side is the abnormal opening? What causes it?






22. From What embryonic layer does the parathyroid arise ?






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






24. From What embryonic layer does the sensory organs of the ear arise?






25. What embryologic structure provides the aorticpulmonary septum?






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






27. When does organogenesis occur?






28. What is the kidney that functions at the interim kidney in the 1st trimester? What does it later contribute to?






29. From what aortic arch does the common carotid artery arise? what else arises from this arch?






30. ______________ is associated with ventral curvature of the penis






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






32. What does the RET gene encode? what neoplasias is it associated with?






33. What is omphalocele? In What trisomies is it seen?






34. Where is the most common ectopic thyroid tissue?






35. What is a zygote?






36. What embryologic structure gives rise to the smooth outflow tracts of the ventricles? what else does it give rise to?






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






38. what closes the ductus arteriousus?






39. 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?






40. In both meningocele and myelomeningocele the dura...






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






42. Most myelomeningoceles present in the _______ region






43. What is another name for the mesonephric duct? paramesonephric?






44. From What embryonic layer do chromaffin cells arise?






45. From What embryonic layer do the salivary - sweat and mammary glands arise?






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






47. What germ layer correlates with the branchial pouches?






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






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






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