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






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






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






4. which posterior fossa malformation results in aqueductal stenosis and hydrocephaly? what other spinal cord lesion does this malformation present with?






5. What is the notochord? What does the notochord later become?






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






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






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






9. what closes the interventricular foramen?






10. What results in annular pancreas? How does it happen?






11. What is associated with only one umbilical artery?






12. The notochord is...






13. What is the most common subtype of tracheoesophageal fistula? name some symptoms (hint: O2 levels - feeding - stomach on CXR - - amnios? - NG tube? - respiratory infection? )






14. what week do the genitalia start to have male/female characteristics? What trimester is that?






15. What are the two walls of the prosencephalon and What do they become?






16. What does the midgut form? hindgut?






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






18. What hormones are in charge of external genitalia development in the fetus? (in both male and female)






19. Cleft palate is a failure of fusion of the lateral palatine processes - the nasal septum and or the ________?






20. what closes the ductus arteriousus?






21. What day is the amnion formed?






22. From What embryonic layer does the skin dermis arise?






23. Which arches form the posterior 1/3 of the tongue?






24. From what region do the thalami form?






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






26. What hormone is hcG structurally similar too?






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






28. From what does bicornuate uterus arise? What is it associated with?






29. From what aortic arch does the common carotid artery arise? what else arises from this arch?






30. From What embryonic layer does the lens of the eye arise?






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






32. Septum primum (patent foramen oval) caused by excessive resorption of...






33. What does the first branchial pouch create?






34. From What embryonic layer is the eustachian tube from?






35. What happens in pancreas divisum? what results?






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






37. What causes persistent Truncus Arteriosus? What does it result in?






38. What teratogen can cause IUGR and ADHD in a fetus? what else can this teratogen cause?






39. What do the groove/clefts of the branchial apparatus correlate to?






40. From What embryonic layer are the melanocytes from?






41. What day is the chorion formed?






42. What embryologic structure gives rise to the smooth outflow tracts of the ventricles? what else does it give rise to?






43. What embryonic structure gives rise to the ascending aorta? what else does it give rise to?






44. From What embryonic layer does the epidermis arise?






45. Which branchial apparatus develops into the inferior parathyroids?






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






47. From where is amniotic fluid produced? other than electrolytes and carbs - what else does it contain?






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






49. what separates the atria from the ventricles?






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