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






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






3. From what aortic arch does the first part of the maxillary artery arise?






4. What is associated with only one umbilical artery?






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






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






7. When does the blastocyst split into two disks? What is this disk called? What are the two germ layers called?






8. What axis is Wnt 7 responsible for developing?






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






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






11. When does hcG get secreted? What does it do?up until when ?






12. What does DHT turn the urogenital folds into? estrogen?






13. During what months is the fetus most susceptible to teratogens? What trimester?






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






15. From what region do the thalami form?






16. From What embryonic layer does the oligodendrocytes arise?






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






18. From What embryonic layer does the brain arise?






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






20. What teratogens can cause discolored teeth?






21. What is an arnold chiari II malformation? through what hole does it herniate?






22. Which branchial apparatus makes the external auditory meatus?






23. Where is erythropoeisis in the weeks 3-8 of fetal development? Where does it occur after that? until when?






24. What is the Eisenmeger complex?






25. What is hypoplasia? is primordial tissue present?






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






27. What are markers for neural tube defects in the amniotic cavity? CSF?






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






29. The spleen is ____________ in origin and supplied by a foregut artery






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






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






32. What is a zygote?






33. What embryological structure gives rise to the coronary sinus?






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






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






36. What does the first branchial pouch create?






37. From What embryonic layer are the serous linings of the body cavities from? for ex - peritoneum?






38. Which branchial apparatus develops into the superior parathyroids?






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






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






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






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






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






44. From What embryonic layer is the bladder and urethra from?






45. Where is the most common ectopic thyroid tissue?






46. When does the notochord form? and When does the neural plate form?






47. What do the groove/clefts of the branchial apparatus correlate to?






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






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






50. What artery is derived branchial (aortic) arch 4?