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 coronary sinus?






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






3. What is meckel's diverticulum? What is it associated with? What does that cause?






4. What arises from the fourth aortic arch?






5. Which branchial apparatus makes the external auditory meatus?






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






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






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






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






10. What germ layer correlates with the branchial pouches?






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






12. During what week does the heart begin to beat?






13. From What embryonic layer do the astrocytes arise?






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






15. From where does pons form from? what else forms from there?






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






17. From What embryonic layer does the parathyroid arise ?






18. What is jejunal - ileal - colonic atresia usually due to? What do you see on x ray?






19. What is the memranous interventricular formaen made from?






20. What causes the decrease in Right atrial pressure to close the fossa ovale?






21. what drug is used to help close a PDA? what else does this drug treat?






22. What is the physiological herniation that occurs at the 6th week - what herniates out of the umbilical ring? when it comes back in the 10th week - What does it rotate around?






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






24. what happens in hydrocele?






25. what closes the ductus arteriousus?






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






27. From what branchial derivative do the parafollicular cells arise?






28. Cleft palate is a failure of formation of the...






29. From What embryonic layer do the ANS arise?






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






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






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






33. What role does the placenta have?






34. Most myelomeningoceles present in the _______ region






35. What causes urine discharge from the umbilicus?






36. Which branchial apparatus develops into the inferior parathyroids?






37. What is used to keep the PDA open?






38. From where do the three different kidneys come from? Which is the earliest one? is it located most cranially or caudally?






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






40. From where does the ureteric bud arise? What does it give rise to?






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






42. From what region of the brain does the lateral ventricles and the 3rd ventricle form?






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






44. From What embryonic layer does connective tissue and muscle arise?






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






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






47. what junction is the last to canalize? what implications does this have down the line?






48. From What embryonic layer does the thyroid follicular cells arise?






49. What is an example of a syndrome that can cause abnormal neural crest migration and thus CV abnormalities?






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