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






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






3. From what does bicornuate uterus arise? What is it associated with?






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






5. Which part of the chorionic villi can make cells?






6. From What embryonic layer does the parathyroid arise ?






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






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






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






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






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






12. What is contained in the umbilical cord?






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






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






15. From What embryonic layer are the schwann cells from ?






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






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






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






19. WithIn what week does gastrulation occur? What is gastrulation?






20. What causes the degeneration of the spinal cord in syringomelia?






21. what happens in hydrocele?






22. The spleen is ____________ in origin and supplied by a foregut artery






23. From where does the medulla form?






24. What embryological structures give rise to the SVC?






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






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






27. What connects the thyroid to the tongue? when happens if it doesnt obliterate?






28. What embryological structure gives rise to the coronary sinus?






29. What causes meconium discharge from the umbilicus?






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






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






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






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






34. What hormone is hcG structurally similar too?






35. From What embryonic layer does the neurohypophysis arise?






36. What are the neural crest cells and where do they come form? where do they go?






37. What is congenital pharyngocutaneous fistula? and How does it occur?






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






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






40. Pyloric stenosis is characterized by _____________ of muscularis externis in the sphincter






41. What does the ductus venosus shunt blood away from? What is its remnant?






42. What artery is derived branchial (aortic) arch 2?






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






44. What two things cause VACTERL syndrome?






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






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






47. Where is the apical ectodermal ridge?






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






49. what other facial defect other than cyclopia is associated with holoprosencephaly?






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