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 muscles are derived from branchial arch 4? CN?






2. what muscles are derived from branchial arch 3?






3. What embryological structures give rise to the SVC?






4. At what week does the fetus look like a baby?






5. What layer is the epiblast? hypoblast?






6. From What embryonic layer do the parafollicular cells of the thyroid arise?






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






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






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






10. From What embryonic layer are the melanocytes from?






11. What surrounds the umbilical cord?






12. From What embryonic layer does the inner arise?






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






14. What is the 'fetal period'- ie When is it?






15. What embryological structure gives rise to the trabeculated parts of the left and right ventricle?






16. Where is the apical ectodermal ridge?






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






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






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






20. What two cavities also form during the second week?






21. What are two common findings in pyloric stenosis?






22. What are the two components of the placenta? From What do they form? which one secreted hcG?






23. From What embryonic layer does bone of the skulls arise?






24. Where does fertilization occur?






25. What causes the transposition of the great vessels? What does it result in?






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






27. Where is Wnt 7 gene produced?






28. From What embryonic layer does a craniopharygioma arise?






29. From What embryonic layer is aorticopulmonary septum from ?






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






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






32. What is annular pancreas associated with in infants?






33. What secretes hCG?






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






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






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






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






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






39. From What embryonic layer does the gut tube derivatives arise (lungs liver - pancreas - parathryroid - thyroid follicular cells - thymus)?






40. ______________ is associated with ventral curvature of the penis






41. What part of the gut rotates around the SMA? and At what point?






42. From where does the pulmonary arteries and the ductus arteriosus arise?






43. From where does the medulla form?






44. what else is the caudal regression known as? What two teratogen can cause this in the fetus?






45. When does erythropoeisis begin in the bone marow?






46. During what week do the limbs begin to form?






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






48. What is the fate of the cervical sinuses that develop from the 2nd -4th branchial grooves?






49. What is the Eisenmeger complex?






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