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






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






3. Only _______________________________ are associated with neural tube defects






4. From which germlayer does the thyroid develop?? From what structure exactly?






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






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






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






8. What hormones are in charge of external genitalia development in the fetus? (in both male and female)






9. Which is more common - epispadias or hypospadias?






10. From where did a branchial cleft cyst arise if it found?






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






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






13. What are the two components of the placenta? From What do they form? which one secreted hcG?






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






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






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






17. Where is Wnt 7 gene produced?






18. What is DiGeorge syndrome and What does it result in?






19. From What embryonic layer are the schwann cells from ?






20. What hormone is hcG structurally similar too?






21. What is meckel's diverticulum? What is it associated with? What does that cause?






22. What causes a vesicourachal diverticulum? What is it?






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






24. By what week is there fetal movement?






25. What embryological structure gives rise to the trabeculated parts of the left and right ventricle?






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






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






28. In what chromosomal disorder is horseshoe kidney commonly seen? what poles of the kidneys fuse?






29. Which cranial nerve innervates the motor function of the tongue?






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






31. What is omphalocele? In What trisomies is it seen?






32. What axis does the alar plate form? what neural system does it become?






33. By what week is the neural tube supposed to be closed? when did it start forming?






34. What two things cause VACTERL syndrome?






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






36. What is associated with only one umbilical artery?






37. Other than not having a brain - what else is a symptom of anencephaly? why? hint: think about amniotic fluid






38. what chemo drugs can cause neural tube defects in the fetus?






39. Which branchial derivative creates the epithelial lining of the palatine tonsils?






40. what closes the interventricular foramen?






41. What two cavities also form during the second week?






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






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






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






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






46. which posterior fossa malformation results in aqueductal stenosis and hydrocephaly? what other spinal cord lesion does this malformation present with?






47. Most myelomeningoceles present in the _______ region






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






49. Which branchial apparatus develops into the superior parathyroids?






50. From what region does the midbrain form from?






Can you answer 50 questions in 15 minutes?



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