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 is the effect of teratogens before week 3?






2. What type of radiation is teratogenic ?






3. From What embryonic lare are the odontoblasts from?






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






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






6. On what side is the abnormal opening in epispadias? What causes it?






7. How do you differentiate a thyroglossal duct cyst from a persistent cervical sinus?






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






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






10. Where is erythropoeisis in the weeks 3-8 of fetal development? Where does it occur after that? until when?






11. Cleft palate is a failure of formation of the...






12. From What embryonic layer do the salivary - sweat and mammary glands arise?






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






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






15. Which parts of the pancreas contribute to the head - uncinate process and main pancreatic duct?






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






17. Most myelomeningoceles present in the _______ region






18. What is the defect in spina bifida occulta? is there any structural herniation? where on the spinal cord is it usually seen?






19. What teratogens can cause discolored teeth?






20. Where does fertilization occur?






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






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






23. in hypospadias - on which side is the abnormal opening? What causes it?






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






25. What embryologic structure provides the aorticpulmonary septum?






26. Which branchial apparatus develops into the inferior parathyroids?






27. What hormones are in charge of external genitalia development in the fetus? (in both male and female)






28. what invaginates to form the primitive streak?






29. What is germinal matrix hemorrhage associated with?






30. From What embryonic layer are the dorsal root and celiac ganglion from?






31. With the first breath the infant take - pulmonary vasculature resistance _______ which causes an increase in left atrial pressure






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






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






34. From what aortic arch does the first part of the maxillary artery arise?






35. From What embryonic layer do chromaffin cells arise?






36. which teratogen can cause Ebsteins anomaly in the fetus?






37. What type of blood do umbilical arteries carry? From where to where?






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






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






40. From What embryonic layer does the retina arise?






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






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






43. Septum primum (patent foramen oval) caused by excessive resorption of...






44. What causes urine discharge from the umbilicus?






45. What is perinauds syndrome?






46. What is associated with only one umbilical artery?






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






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






49. From what arches are the neural crest cells that form the aorticpulmonary septum derived?






50. What type of blood do umbilical veins carry? From where to where?