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 bone/cartilage and nerves are derived from branchial arch 2?






2. What is the female remnant of the gubernaculum? male remnant?






3. When does hCG secretion take place? with what event?






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






5. What do the arches of the branchial apparatus correlate to?






6. _____________is common in 1st born males






7. What germ layer correlates with the branchial pouches?






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






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






10. What trisomy is associated with holoprosencephaly? What teratogen?






11. From What embryonic layer does the pineal gland arise?






12. When is most important to take folic acid to prevent neural tube defects?






13. What type of - amnios does bilateral agenesis form? What three symptoms does this cause?






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






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






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






17. What embryologic structure provides the aorticpulmonary septum?






18. What is the Eisenmeger complex?






19. From What embryonic layer do chromaffin cells arise?






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






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






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






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






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






25. What do the 2nd through 4th clefts of the branchial apparatus correlate to?






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






27. Where is Wnt 7 gene produced?






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






29. From what region of the brain does the aqueduct form?






30. Which branchial apparatus makes the external auditory meatus?






31. what chemo drugs can cause neural tube defects in the fetus?






32. In anencephaly you see...






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






34. How many umbilical arteries are there? How many umbilical veins?






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






36. From What embryonic layer do the ANS arise?






37. What effect does warfarin have on the fetus?






38. What does DHT turn the genital tubercle into? estrogen?






39. From What embryonic layer does the inner arise?






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






41. Which is more common - epispadias or hypospadias?






42. What is the kidney that functions at the interim kidney in the 1st trimester? What does it later contribute to?






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






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






45. Where does fertilization occur?






46. What produces testis determining factor? what cells are produced from this? and What do they secrete? does this result in?






47. From what region do the thalami form?






48. From what region does the cerebral hemisphere form?






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






50. From What embryonic layer does the parathyroid arise ?