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. Cleft palate is a failure of fusion of the lateral palatine processes - the nasal septum and or the ________?






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






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






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






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






6. In anencephaly you see...






7. What hormone is hcG structurally similar too?






8. What role does the placenta have?






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






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






11. What is the effect of teratogens before week 3?






12. What is contained in the umbilical cord?






13. From What embryonic layer does bone of the skulls arise?






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






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






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






17. From What embryonic layer does the adenohypophysis arise?






18. What causes urine discharge from the umbilicus?






19. From What embryonic layer do the parafollicular cells of the thyroid arise?






20. What is a zygote?






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






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






23. What are two common findings in pyloric stenosis?






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






25. What teratogen can cause vaginal clear cell adenocarcinoma in the fetus?






26. How does annular pancreas present in children?






27. Name two endocardial cushion defects.






28. What is the mnueomonic for the mesodermal defects? What does it stand for?






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






30. Which branchial derivative accounts for taste in the ant 2/3?






31. what closes the ductus arteriousus?






32. What artery is derived branchial (aortic) arch 6?






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






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






35. What two things cause VACTERL syndrome?






36. How do AV canals form?






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






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






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






40. what invaginates to form the primitive streak?






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






42. What artery is derived branchial (aortic) arch 1?






43. From What embryonic layer do CNS neurons arise?






44. Blood coming in the umbilical vein is ____ saturated






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






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






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






48. What is jejunal - ileal - colonic atresia usually due to? What do you see on x ray?






49. From What embryonic layer does the epidermis arise?






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