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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 secretion take place? with what event?






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






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






4. What type of radiation is teratogenic ?






5. What is associated with only one umbilical artery?






6. From What embryonic layer does the spinal cord arise?






7. From what aortic arch does the stapedial artery arise? the hyoid?






8. From What embryonic layer is aorticopulmonary septum from ?






9. From What embryonic layer do the astrocytes arise?






10. Weeks _______ erythropoiesis takes place in the liver






11. What separates the ant 1/3 and post 2/3 of tongue?






12. From What embryonic layer does the retina arise?






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






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






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






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






17. Monochorionic - ___________ twins are conjoined






18. What teratogen can cause inhibition of intestinal folate absorption and thus neural tube defects?






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






20. Name a syndrome cleft palate is often seen in






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






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






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






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






25. What is the prochordal plate?






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






27. What does the vitelline duct connect? What is it also known as? when should it obliterate?






28. What surrounds the umbilical cord?






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






30. How does annular pancreas present in children?






31. During what periods do the damages that cerebral palsy causes occur?






32. From where does the permanent kidney for? is it most caudal or most cranial?






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






34. What are the two types of posterior fossa malformations? which one results in a hindbrain crowding? and which results in an enlarged posterior fossa? which one is associated with syringomelia?






35. What does the ductus arteriosus shunt blood away from - to where? What is its remnant?






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






37. How do adults with annular pancreas present? and At What age?






38. From What embryonic layer is the kidney and the adrenal cortex from?






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






40. What causes tetralogy of Fallot?






41. Where is sonic hedgehog gene produced? What axis is it responsible in patterning?






42. When does the notochord form? and When does the neural plate form?






43. What does the foramen ovale shunt blood from - to where? What is its remnant?






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






45. What congenital abnormality forms a 'double bubble' on xray?






46. What germ layer correlates with the branchial pouches?






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






48. what closes the ductus arteriousus?






49. From what region does the cerebral hemisphere form?






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







Sorry!:) No result found.

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