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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. what invaginates to form the primitive streak?






2. From What embryonic layer does the adenohypophysis arise?






3. What are the clinical symptoms that present with syringomelia?






4. What three layers form during gastrulation? From What do they form? and what week does gastrulation occur?






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






6. What hormone is hcG structurally similar too?






7. What is a zygote?






8. Where is the decidua basalis derived from?






9. What causes urine discharge from the umbilicus?






10. Most myelomeningoceles present in the _______ region






11. What components do the neural crest cells of the branchial arches give rise to?






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






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






14. What type of blood do umbilical arteries carry? From where to where?






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






16. When does organogenesis occur?






17. From What embryonic layer does bone arise ?






18. What is the effect of teratogens before week 3?






19. Which part of the branchial apparatus makes up membranes?






20. Which branchial arch derivative is obliterated?






21. On what side is the abnormal opening in epispadias? What causes it?






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






23. What are the two components of the fetal component of the placenta?






24. What is an example of a syndrome that can cause abnormal neural crest migration and thus CV abnormalities?






25. Name two endocardial cushion defects.






26. From What embryonic layer does the epidermis arise?






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






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






29. Which is more common - epispadias or hypospadias?






30. failure to close of what fold results in sternal defects? omphalocele? gastrochisis? bladder extrosphy?






31. During what week do the limbs begin to form?






32. What are the aspects of fetal alcohol syndrome?






33. What causes the degeneration of the spinal cord in syringomelia?






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






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






36. What part of the fetal comp of the placenta secretes hCG? is this part on the inner or outer layer of the chorionic villi? does it make cells?






37. From What embryonic layer is the spleen from?






38. From What embryonic layer does the pineal gland arise?






39. What teratogens can cause CN VIII toxicity in the fetus?






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






41. Which branchial apparatus develops into the superior parathyroids?






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






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






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






45. From what region does the cerebral hemisphere form?






46. Where is the apical ectodermal ridge?






47. What causes a patent foramen ovale?






48. What is the memranous interventricular formaen made from?






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






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







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