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USMLE Embryo

Subjects : health-sciences, usmle
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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. From What embryonic layer are the schwann cells from ?






2. From What embryonic layer does a craniopharygioma arise?






3. what happens in hydrocele?






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






5. What part of the gut rotates around the SMA? and At what point?






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






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






8. From which branchial derivative does the anterior 2/3 of the tongue develop?






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






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






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






12. what structures are the derivatives of the neural crest cells in branchial arches?






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






14. What causes tetralogy of Fallot?






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






16. During what periods do the damages that cerebral palsy causes occur?






17. Which is more common - epispadias or hypospadias?






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






19. What embryological structure gives rise to the smooth part of the right atrium?






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






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






22. What gene is produced in the zone of polarizing activity?






23. What is perinauds syndrome?






24. What causes a vesicourachal diverticulum? What is it?






25. What results in annular pancreas? How does it happen?






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






27. From where do the three different kidneys come from? Which is the earliest one? is it located most cranially or caudally?






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






29. What congenital abnormality forms a 'double bubble' on xray?






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






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






32. From What embryonic layer are the pia and arachnoid from?






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






34. Which branchial apparatus derivative makes the tympanic membrane of the ear?






35. what closes the ductus arteriousus?






36. From where did a branchial cleft cyst arise if it found?






37. What effect does warfarin have on the fetus?






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






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






40. What day is the amnion formed?






41. From what region does the cerebral hemisphere form?






42. From What embryonic layer does the brain arise?






43. In both meningocele and myelomeningocele the dura...






44. what muscles are derived from branchial arch 4? CN?






45. Which branchial derivative creates the epithelial lining of the palatine tonsils?






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






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






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






49. From What embryonic layer does the parathyroid arise ?






50. Cleft lip is a failure of formation of the...







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