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. What is the difference between agenesis and aplasia?






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






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






4. What causes urine discharge from the umbilicus?






5. What is associated with only one umbilical artery?






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






7. what structures are the derivatives of the neural crest cells in branchial arches?






8. From what region do the thalami form?






9. ______________ is associated with ventral curvature of the penis






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






11. What axis does the basal plate form? what neural system does it become?






12. What axis is Wnt 7 responsible for developing?






13. What secretes hCG?






14. what closes the interventricular foramen?






15. What are the aspects of fetal alcohol syndrome?






16. What gene is produced in the zone of polarizing activity?






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






18. Name two endocardial cushion defects.






19. What is congenital pharyngocutaneous fistula? and How does it occur?






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






21. Most myelomeningoceles present in the _______ region






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






23. What is the Eisenmeger complex?






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






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






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






27. What is a zygote?






28. How do AV canals form?






29. What is the neural plate and From what does it form?






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






31. From where does the prostate develop? seminal vesicles? fallopian tube? lower 2/3 of the vagina? ejaculatory duct? epididymis? uterus? upper 1/3 of the vagina?






32. When does erythropoeisis begin in the bone marow?






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






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






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






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






37. From What embryonic layer is the bladder and urethra from?






38. Monochorionic - ___________ twins are conjoined






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






40. In both meningocele and myelomeningocele the dura...






41. What role does the placenta have?






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






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






44. For what reason do hypospadias need to be fixed?






45. What causes meconium discharge from the umbilicus?






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






47. From which branchial derivative does the anterior 2/3 of the tongue develop?






48. What artery is derived branchial (aortic) arch 6?






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






50. What artery is derived branchial (aortic) arch 2?