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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. From What embryonic lare are the odontoblasts from?






2. What is duodenal atresia usually due to? What trisomy is it most often seen in?






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






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






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






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






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






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






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






10. From What embryonic layer does the inner arise?






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






12. Name two endocardial cushion defects.






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






14. From What embryonic layer do CNS neurons arise?






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






16. Only _______________________________ are associated with neural tube defects






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






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






19. What is the most common autopsy finding in brains of premature infants?






20. What connects the thyroid to the tongue? when happens if it doesnt obliterate?






21. From What embryonic layer does the adenohypophysis arise?






22. Which arches form the posterior 1/3 of the tongue?






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






24. What does the ductus venosus shunt blood away from? What is its remnant?






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






26. What embryologic structure provides the aorticpulmonary septum?






27. Which branchial derivative accounts for the posterior 2/3 of the tongue?






28. From What embryonic layer does the parathyroid arise ?






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






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






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






32. What causes persistent Truncus Arteriosus? What does it result in?






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






34. From What embryonic layer does the spinal cord arise?






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






36. What causes the decrease in Right atrial pressure to close the fossa ovale?






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






38. what structures are the derivatives of the neural crest cells in branchial arches?






39. From where does the pulmonary arteries and the ductus arteriosus arise?






40. From What embryonic layer does the skin dermis arise?






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






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






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






44. From what region of the brain does the lateral ventricles and the 3rd ventricle form?






45. From where is the allantois formed? During what week?






46. From what region does the midbrain form from?






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






48. From where to Where is the foregut derivative? midgut? hindgut?






49. What is the difference between agenesis and aplasia?






50. What is the memranous interventricular formaen made from?







Sorry!:) No result found.

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