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






2. What is a teratogen that causes Ebsteins anomaly? What is ebsteins anomaly?

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






4. what separates the atria from the ventricles?






5. What is a syrinx? Where is it found in syringomelia? What is it associated with?






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






7. What does the RET gene encode? what neoplasias is it associated with?






8. What components do the mesoderm of the branchial arches give rise to?






9. From What embryonic layer are the serous linings of the body cavities from? for ex - peritoneum?






10. What arises from the fourth aortic arch?






11. From What embryonic layer does the oligodendrocytes arise?






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






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






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






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






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






17. failure to close of what fold results in sternal defects? omphalocele? gastrochisis? bladder extrosphy?






18. From where does the medulla form?






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






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






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






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






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






24. What causes urine discharge from the umbilicus?






25. What are the three regions of the brain (in order of cranial to caudal)?






26. What teratogens can cause flipper limbs (limb defects)? What is this drug used for?






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






28. Where is the apical ectodermal ridge?






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






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






31. what invaginates to form the primitive streak?






32. From What embryonic layer do the astrocytes arise?






33. What is the homeobox gene responsible in developing? (What axis)






34. What part of the fetal comp of the placenta secretes hCG? is this part on the inner or outer layer of the chorionic villi? does it make cells?






35. What teratogens can cause renal damage in the fetus?






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






37. From What embryonic layer do the ependymal cells arise?






38. What does the maternal component of the placenta provide? Where is it derived from?






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






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






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






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






43. _____________is common in 1st born males






44. From What embryonic layer does the gut tube derivatives arise (lungs liver - pancreas - parathryroid - thyroid follicular cells - thymus)?






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






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






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






48. From What embryonic layer is the vagina from? testes? ovaries?






49. What day is the amnion formed?






50. Where is Wnt 7 gene produced?







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