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 embryological structure gives rise to the trabeculated part of the left and right atrium?






2. What causes a patent foramen ovale?






3. What is the Eisenmeger complex?






4. What hormone is hcG structurally similar too?






5. What teratogens can cause renal damage in the fetus?






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






7. What components do the neural crest cells of the branchial arches give rise to?






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






9. What secretes hCG?






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






11. What does the midgut form? hindgut?






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






13. What are the clinical symptoms that present with syringomelia?






14. From What embryonic layer does the neurohypophysis arise?






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






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






17. What does the ductus venosus shunt blood away from? What is its remnant?






18. What is the difference between agenesis and aplasia?






19. what muscles are derived from branchial arch 6? CN?






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






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






22. What embryological structures give rise to the SVC?






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






24. failure to close of what fold results in sternal defects? omphalocele? gastrochisis? bladder extrosphy?






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






26. what closes the interventricular foramen?






27. From where does the medulla form?






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






29. What teratogens can cause CN VIII toxicity in the fetus?






30. From What embryonic layer do CNS neurons arise?






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






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






33. What layer is the epiblast? hypoblast?






34. When does erythropoeisis begin in the bone marow?






35. The spinal cord is made from...






36. What artery is derived branchial (aortic) arch 4?






37. From where is the pancreas derived? the spleen?






38. Where is the most common ectopic thyroid tissue?






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






40. From What embryonic layer does bone arise ?






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






42. What is another name for the mesonephric duct? paramesonephric?






43. What embryological structure gives rise to the coronary sinus?






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






45. What is the mcc of renovascular hypertension in children? What does this predispose to?






46. To what germ layer does the branchial pouches correlate to?






47. What teratogens can cause flipper limbs (limb defects)? What is this drug used for?






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






49. From What embryonic layer do the ANS arise?






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