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 invaginates to form the primitive streak?






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






3. Cleft lip is a failure of fusion of ________ and ______.






4. What embryonic structure gives rise to the ascending aorta? what else does it give rise to?






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






6. From What embryonic layer does the retina arise?






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






8. From What embryonic layer do the ANS arise?






9. What is the Eisenmeger complex?






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






11. Where does fertilization occur?






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






13. During what week do the limbs begin to form?






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






15. Which branchial derivative creates the middle ear cavity - eustachian tube and mastoid air cells?






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






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






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






19. What are the two components of the placenta? From What do they form? which one secreted hcG?






20. What artery is derived branchial (aortic) arch 4?






21. What effect does warfarin have on the fetus?






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






23. what closes the interventricular foramen?






24. Name a syndrome cleft palate is often seen in






25. From what region do the thalami form?






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






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






28. In what chromosomal disorder is horseshoe kidney commonly seen? what poles of the kidneys fuse?






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






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






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






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






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






34. What separated myometrium of the uterus from the blastocyst?






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






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






37. What happens in pancreas divisum? what results?






38. What is duodenal atresia usually due to? What trisomy is it most often seen in?






39. Blood coming in the umbilical vein is ____ saturated






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






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






42. What causes a large posterior fossa in a dandy walker malformation? What is found in this fossa?






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






44. What causes meconium discharge from the umbilicus?






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






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






47. is epispadias or hypospadias associated with exstrophy of the bladder?






48. What are the two components of the fetal component of the placenta?






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






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