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. which teratogen can cause Ebsteins anomaly in the fetus?






2. What artery is derived branchial (aortic) arch 6?






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






4. What axis is Wnt 7 responsible for developing?






5. When does organogenesis occur?






6. What is congenital pharyngocutaneous fistula? and How does it occur?






7. What are the three regions of the brain (in order of cranial to caudal)?






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






9. what else is the caudal regression known as? What two teratogen can cause this in the fetus?






10. failure to close of what fold results in sternal defects? omphalocele? gastrochisis? bladder extrosphy?






11. What can vit A in excess cause in the fetus?






12. Which branchial apparatus makes the external auditory meatus?






13. What type of blood do umbilical veins carry? From where to where?






14. From What embryonic layer does the oligodendrocytes arise?






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






16. what week do the genitalia start to have male/female characteristics? What trimester is that?






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






18. What is used to keep the PDA open?






19. What does the first branchial pouch create?






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






21. What is an example of a syndrome that can cause abnormal neural crest migration and thus CV abnormalities?






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






23. Septum primum (patent foramen oval) caused by excessive resorption of...






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






25. what bone/cartilage and nerves are derived from branchial arch 3?






26. What produces testis determining factor? what cells are produced from this? and What do they secrete? does this result in?






27. Which branchial derivative accounts for taste in the ant 2/3?






28. What arises from the fourth aortic arch?






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






30. What part of the vagina does the mullerian duct form? Where does the rest come from?






31. From What embryonic layer does the brain arise?






32. What artery is derived branchial (aortic) arch 3?






33. What teratogen can cause vaginal clear cell adenocarcinoma in the fetus?






34. What day is the amnion formed?






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






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






37. What does DHT turn the urogenital sinus into? estrogen?






38. From What embryonic layer are the melanocytes from?






39. What causes a patent foramen ovale?






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






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






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






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






44. From what does bicornuate uterus arise? What is it associated with?






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






46. What two things cause VACTERL syndrome?






47. When does hCG secretion take place? with what event?






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






49. Where is sonic hedgehog gene produced? What axis is it responsible in patterning?






50. From what region do the thalami form?