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 arises from the fourth aortic arch?






2. _____________is common in 1st born males






3. Gastroschisis is extrusion of abdominal contents out of abdominal folds ___________ by peritoneum






4. What is an arnold chiari II malformation? through what hole does it herniate?






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






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






7. From What embryonic layer do the astrocytes arise?






8. What two things cause VACTERL syndrome?






9. What is the Eisenmeger complex?






10. What is the neural plate and From what does it form?






11. During what months is the fetus most susceptible to teratogens? What trimester?






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






13. From What embryonic layer do CNS neurons arise?






14. Which branchial apparatus develops into the inferior parathyroids?






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






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






17. From What embryonic layer does the adenohypophysis arise?






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






19. From where does the signal come from to suppress paramesonephric ducts? what stimulates development of the mesonephric ducts?






20. What does the RET gene encode? what neoplasias is it associated with?






21. What is Treacher Collins syndrome? What is the result?






22. What are two common findings in pyloric stenosis?






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






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






25. What is perinauds syndrome?






26. What components do the mesoderm of the branchial arches give rise to?






27. The notochord is...






28. From What embryonic layer are the cardiovascular - lymphatics and blood from?






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






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






31. what invaginates to form the primitive streak?






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






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






34. What causes tetralogy of Fallot?






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






36. What embryological structures give rise to the SVC?






37. What is omphalocele? In What trisomies is it seen?






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






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






40. From What embryonic layer does bone arise ?






41. What is the difference between agenesis and aplasia?






42. From What embryonic layer does the retina arise?






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






44. what closes the interventricular foramen?






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






46. How is amniontic fluid excreted? How is amniotic fluid resorped?






47. What does DHT turn the urogenital folds into? estrogen?






48. What secretes hCG?






49. What can vit A in excess cause in the fetus?






50. Where is the FGF gene produced? What is it responsible for - How does it do this?