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 causes tetralogy of Fallot?






2. What causes the obstruction in pyloric stenosis? treatment?






3. From What embryonic layer does the brain arise?






4. Name a syndrome cleft palate is often seen in






5. From where does the prostate develop? seminal vesicles? fallopian tube? lower 2/3 of the vagina? ejaculatory duct? epididymis? uterus? upper 1/3 of the vagina?






6. What do the groove/clefts of the branchial apparatus correlate to?






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






8. What weeks are considered the 'embryonic period'?






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






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






11. What role does the placenta have?






12. What surrounds the umbilical cord?






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






14. what bone/cartilage and nerves are derived from branchial arch 1?






15. What are the aspects of fetal alcohol syndrome?






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






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






18. What causes meconium discharge from the umbilicus?






19. From what aortic arch does the common carotid artery arise? what else arises from this arch?






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






21. What is the notochord? What does the notochord later become?






22. From What embryonic layer does the epidermis arise?






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






24. In anencephaly you see...






25. Which branchial derivative accounts for the posterior 2/3 of the tongue?






26. What happens in pancreas divisum? what results?






27. Where is Wnt 7 gene produced?






28. What part of the vagina does the mullerian duct form? Where does the rest come from?






29. From What embryonic layer are the melanocytes from?






30. What is the fate of the cervical sinuses that develop from the 2nd -4th branchial grooves?






31. Which CN allows for taste and sensation in the posterior 1/3 of the tongue? how about the very back ?






32. What are markers for neural tube defects in the amniotic cavity? CSF?






33. In order to survive tricuspid atresia - What do you need?






34. What is the difference between agenesis and aplasia?






35. Blood coming in the umbilical vein is ____ saturated






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






37. Where is the most common ectopic thyroid tissue?






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






39. The inner layer of the chorionic villi...






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






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






42. When does hcG get secreted? What does it do?up until when ?






43. what muscles are derived from branchial arch 3?






44. From which myotomes are muscles of the tongue derived from?






45. From What embryonic layer does bone arise ?






46. When does organogenesis occur?






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






48. From What embryonic layer does the skin dermis arise?






49. What embryologic structure gives rise to the smooth outflow tracts of the ventricles? what else does it give rise to?






50. _____________is common in 1st born males