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. Where is the apical ectodermal ridge?






2. Does malformation occur during or after the embryonic period? is it due to an extrinsic or intrinsic disruption?






3. What components do the mesoderm of the branchial arches give rise to?






4. What is the defect in spina bifida occulta? is there any structural herniation? where on the spinal cord is it usually seen?






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






6. What is a zygote?






7. What causes meconium discharge from the umbilicus?






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






9. From What embryonic layer does the oligodendrocytes arise?






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






11. From What embryonic layer does the brain arise?






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






13. The notochord is...






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






15. What does the midgut form? hindgut?






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






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






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






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






20. Which branchial apparatus develops into the thymus?






21. What type of radiation is teratogenic ?






22. What surrounds the umbilical cord?






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






24. The inner layer of the chorionic villi...






25. What are the three results of having pathology in the aorticopulmonary septum?






26. What is the 'fetal period'- ie When is it?






27. From What embryonic layer is the spleen from?






28. What results in annular pancreas? How does it happen?






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






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






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






32. Cleft palate is a failure of formation of the...






33. what other facial defect other than cyclopia is associated with holoprosencephaly?






34. From What embryonic layer does the epidermis arise?






35. What are the aspects of fetal alcohol syndrome?






36. Name a syndrome cleft palate is often seen in






37. What axis is Wnt 7 responsible for developing?






38. What does the first branchial pouch create?






39. What teratogen can cause an absence of digits amongst other things in the fetus? give an example.






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






41. From What embryonic layer do the astrocytes arise?






42. Which CN allows for taste and sensation in the posterior 1/3 of the tongue? how about the very back ?






43. What role does the placenta have?






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






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






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






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






48. What separates the ant 1/3 and post 2/3 of tongue?






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






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