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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 CN accounts for the anterior 2/3 of the tongues sensation and pain? how about taste?






3. Where is the most common ectopic thyroid tissue?






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






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






6. What is Treacher Collins syndrome? What is the result?






7. In anencephaly you see...






8. From What embryonic layer does the epidermis arise?






9. Which branchial apparatus develops into the superior parathyroids?






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






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






12. what closes the interventricular foramen?






13. What does the first branchial pouch create?






14. To what germ layer does the branchial pouches correlate to?






15. From what region do the thalami form?






16. Pyloric stenosis is characterized by _____________ of muscularis externis in the sphincter






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






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






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






20. which tracts are damaged first in syringomelia? What tract is preserved?






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






22. Where is erythropoeisis in the weeks 3-8 of fetal development? Where does it occur after that? until when?






23. Which part of pancreas contribute to body? tail? isthmus? accessory pancreatic duct?






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






25. Which branchial derivative accounts for the sensation and taste in the posterior 2/3 of the tongue? how about the very back?






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






27. During what week does the heart begin to beat?






28. Monochorionic - ___________ twins are conjoined






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






30. What does DHT turn the urogenital sinus into? estrogen?






31. From What embryonic layer does the parathyroid arise ?






32. Before birth - blood entering the LA is less than...






33. From What embryonic layer does the neurohypophysis arise?






34. From where do the three different kidneys come from? Which is the earliest one? is it located most cranially or caudally?






35. 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?






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






37. What does DHT turn the genital tubercle into? estrogen?






38. From where does the signal come from to suppress paramesonephric ducts? what stimulates development of the mesonephric ducts?






39. What is jejunal - ileal - colonic atresia usually due to? What do you see on x ray?






40. What does DHT turn the urogenital folds into? estrogen?






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






42. What is the physiological herniation that occurs at the 6th week - what herniates out of the umbilical ring? when it comes back in the 10th week - What does it rotate around?






43. What are two common findings in pyloric stenosis?






44. From What embryonic layer are the melanocytes from?






45. _____________is common in 1st born males






46. Gastroschisis is extrusion of abdominal contents out of abdominal folds ___________ by peritoneum






47. What weeks are considered the 'embryonic period'?






48. ______________ is associated with ventral curvature of the penis






49. What do the 2nd through 4th clefts of the branchial apparatus correlate to?






50. From What embryonic layer does the gut tube epithelium arise?







Sorry!:) No result found.

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