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 secretes hCG?






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






3. To what germ layer does the branchial pouches correlate to?






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






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






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






7. Where is the most common ectopic thyroid tissue?






8. What do the arches of the branchial apparatus correlate to?






9. What is the prochordal plate?






10. What are the two walls of the prosencephalon and What do they become?






11. Which branchial derivative creates the middle ear cavity - eustachian tube and mastoid air cells?






12. what separates the atria from the ventricles?






13. What is Treacher Collins syndrome? What is the result?






14. What surrounds the umbilical cord?






15. What is perinauds syndrome?






16. What does the midgut form? hindgut?






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






18. What day is the amnion formed?






19. From What embryonic layer does the oligodendrocytes arise?






20. What do membranous interventricular septal defect cause? What does this lead to?






21. WithIn what week does gastrulation occur? What is gastrulation?






22. What is the neural plate and From what does it form?






23. From What embryonic layer does bone arise ?






24. In anencephaly you see...






25. From What embryonic layer is the vagina from? testes? ovaries?






26. From What embryonic layer does the brain arise?






27. _____________is common in 1st born males






28. what invaginates to form the primitive streak?






29. What causes tetralogy of Fallot?






30. From What embryonic layer does connective tissue and muscle arise?






31. As a horseshoe kidney ascends during kidney development - What do they get trapped under?






32. From what region does the midbrain form from?






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






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






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






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






37. Where is Wnt 7 gene produced?






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






39. From What embryonic layer is the kidney and the adrenal cortex from?






40. From what branchial derivative do the parafollicular cells arise?






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






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






43. What embryological structures give rise to the SVC?






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






45. Cleft palate is a failure of fusion of the lateral palatine processes - the nasal septum and or the ________?






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






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






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






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






50. What teratogens can cause renal damage in the fetus?