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. From What embryonic layer does the sensory organs of the ear arise?






2. What does DHT turn the labioscrotal swelling into? estrogen?






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






4. What is the effect of teratogens after week 8?






5. what drug is used to help close a PDA? what else does this drug treat?






6. From What embryonic layer do the astrocytes arise?






7. Which part of the chorionic villi can make cells?






8. From What embryonic layer does the parathyroid arise ?






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






10. what closes the ductus arteriousus?






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






12. What artery is derived branchial (aortic) arch 1?






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






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






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






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






17. what results if they dont? What can increase the risks of this?






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






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






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






21. From What embryonic layer are the dorsal root and celiac ganglion from?






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






23. Where does the blastocyst implant in the uterus? During what phase of the menstrual cycle?






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






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






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






27. From What embryonic layer does the adenohypophysis arise?






28. How many umbilical arteries are there? How many umbilical veins?






29. What two things cause VACTERL syndrome?






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






31. What does the first branchial pouch create?






32. What does the maternal component of the placenta provide? Where is it derived from?






33. From What embryonic layer does the neurohypophysis arise?






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






35. From what arches are the neural crest cells that form the aorticpulmonary septum derived?






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. What is holoprosencephaly? what eye disorder does it result in?






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






39. What does the RET gene encode? what neoplasias is it associated with?






40. What is the leading cause of birth defects in the US? what else is this perpetrator the leading cause of?






41. What is annular pancreas associated with in infants?






42. What causes urine discharge from the umbilicus?






43. From where does the medulla form?






44. What is the allantois become? What is this duct connected to ( on both ends)?






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






46. When does hCG secretion take place? with what event?






47. How is amniontic fluid excreted? How is amniotic fluid resorped?






48. What is the most common autopsy finding in brains of premature infants?






49. what bone/cartilage and nerves are derived from branchial arch 1?






50. _____________is common in 1st born males