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






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






3. Which branchial apparatus makes the external auditory meatus?






4. From What embryonic layer are the melanocytes from?






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






6. From what aortic arch does the first part of the maxillary artery arise?






7. From where does pons form from? what else forms from there?






8. What embryological structure gives rise to the smooth part of the right atrium?






9. what muscles are derived from branchial arch 1?






10. From What embryonic layer is aorticopulmonary septum from ?






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






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






13. Which is more common - epispadias or hypospadias?






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






15. What separated myometrium of the uterus from the blastocyst?






16. When is most important to take folic acid to prevent neural tube defects?






17. What is an arnold chiari II malformation? through what hole does it herniate?






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






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






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






21. From What embryonic layer do the astrocytes arise?






22. What embryological structure gives rise to the coronary sinus?






23. Where is Wnt 7 gene produced?






24. what bone/cartilage and nerves are derived from branchial arch 3?






25. What is the mnueomonic for the mesodermal defects? What does it stand for?






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






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






28. Which parts of the pancreas contribute to the head - uncinate process and main pancreatic duct?






29. What is a syrinx? Where is it found in syringomelia? What is it associated with?






30. What causes the obstruction in pyloric stenosis? treatment?






31. What does the foramen ovale shunt blood from - to where? What is its remnant?






32. Which branchial apparatus develops into the superior parathyroids?






33. From what aortic arch does the stapedial artery arise? the hyoid?






34. What is the Eisenmeger complex?






35. From What embryonic layer do chromaffin cells arise?






36. Where is the FGF gene produced? What is it responsible for - How does it do this?






37. Blood coming in the umbilical vein is ____ saturated






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






39. 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?






40. What causes meconium discharge from the umbilicus?






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






42. What teratogens can cause discolored teeth?






43. From What embryonic layer does the thyroid follicular cells arise?






44. From What embryonic layer does the epidermis arise?






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






46. Most myelomeningoceles present in the _______ region






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






48. What day is the amnion formed?






49. What type of - amnios does bilateral agenesis form? What three symptoms does this cause?






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






Can you answer 50 questions in 15 minutes?



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