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






2. From What embryonic layer are the pia and arachnoid from?






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






4. Name a syndrome cleft palate is often seen in






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






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






7. From where is the allantois formed? During what week?






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






9. What is the initial step to interventricular septum development? is it complete?






10. What is the effect of teratogens before week 3?






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






12. When does hcG get secreted? What does it do?up until when ?






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






14. What embryological structures give rise to the SVC?






15. What are two common findings in pyloric stenosis?






16. From what germ layer does the primitive heart tube arise?






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






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






19. When does erythropoeisis begin in the bone marow?






20. in hypospadias - on which side is the abnormal opening? What causes it?






21. When does organogenesis occur?






22. From What embryonic layer do the salivary - sweat and mammary glands arise?






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






24. From What embryonic layer does the retina arise?






25. What is duodenal atresia usually due to? What trisomy is it most often seen in?






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






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






28. What is the homeobox gene responsible in developing? (What axis)






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






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






31. From What embryonic layer does the epithelial linings of the oral cavity arise?






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






33. What two things cause VACTERL syndrome?






34. what muscles are derived from branchial arch 1?






35. From what region does the cerebral hemisphere form?






36. What artery is derived branchial (aortic) arch 3?






37. From What embryonic layer does the brain arise?






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






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






40. From What embryonic layer do the astrocytes arise?






41. What is the primitive streak? From what layer does it form?






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






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






44. What trisomy is associated with holoprosencephaly? What teratogen?






45. Only _______________________________ are associated with neural tube defects






46. How do you differentiate a thyroglossal duct cyst from a persistent cervical sinus?






47. Which branchial apparatus develops into the thymus?






48. Which branchial arch derivative is obliterated?






49. What hormone is hcG structurally similar too?






50. Which branchial derivative accounts for the posterior 2/3 of the tongue?