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






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






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






4. What day is the amnion formed?






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






6. What is annular pancreas associated with in infants?






7. In order to survive tricuspid atresia - What do you need?






8. What are the two types of posterior fossa malformations? which one results in a hindbrain crowding? and which results in an enlarged posterior fossa? which one is associated with syringomelia?






9. From What embryonic layer does the lens of the eye arise?






10. what muscles are derived from branchial arch 4? CN?






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






12. What causes a large posterior fossa in a dandy walker malformation? What is found in this fossa?






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






14. During what week does the heart begin to beat?






15. From where does the medulla form?






16. What is the mcc of renovascular hypertension in children? What does this predispose to?






17. What is the memranous interventricular formaen made from?






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






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






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






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






22. which genital embryology is default? From what duct? what duct degenerates without signal to stay?






23. What weeks are considered the 'embryonic period'?






24. Cleft lip is a failure of fusion of ________ and ______.






25. From where does the permanent kidney for? is it most caudal or most cranial?






26. What does the midgut form? hindgut?






27. How many umbilical arteries are there? How many umbilical veins?






28. Which branchial arch derivative is obliterated?






29. What trisomy is associated with holoprosencephaly? What teratogen?






30. Which part of the chorionic villi can make cells?






31. From What embryonic layer is the eustachian tube from?






32. From What embryonic layer does the inner arise?






33. From what are the umbilical arteries and veins derived from?






34. what muscles are derived from branchial arch 2?






35. From What embryonic layer does the gut tube epithelium arise?






36. What is the prochordal plate?






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






38. From what region of the brain does the fourth ventricle form?






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






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






41. Name two endocardial cushion defects.






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






43. What is the defect in spina bifida occulta? is there any structural herniation? where on the spinal cord is it usually seen?






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






45. Where is the decidua basalis derived from?






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






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






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






49. 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?






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