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






2. which posterior fossa malformation results in aqueductal stenosis and hydrocephaly? what other spinal cord lesion does this malformation present with?






3. Other than not having a brain - what else is a symptom of anencephaly? why? hint: think about amniotic fluid






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






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






6. From What embryonic layer does the pineal gland arise?






7. From What embryonic layer do chromaffin cells arise?






8. Where does fertilization occur?






9. Blood coming in the umbilical vein is ____ saturated






10. What are the two walls of the prosencephalon and What do they become?






11. Weeks _______ erythropoiesis takes place in the liver






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






13. What embryological structure gives rise to the trabeculated part of the left and right atrium?






14. What is another name for the mesonephric duct? paramesonephric?






15. Where is the apical ectodermal ridge?






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






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






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






19. What causes persistent Truncus Arteriosus? What does it result in?






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






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






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






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






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






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






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






27. What is DiGeorge syndrome and What does it result in?






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






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






30. How many components are there to the placenta? What are they called?






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






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






33. From What embryonic layer are the melanocytes from?






34. What is the allantois become? What is this duct connected to ( on both ends)?






35. what separates the atria from the ventricles?






36. From where does pons form from? what else forms from there?






37. From what germ layer does the primitive heart tube arise?






38. What is congenital pharyngocutaneous fistula? and How does it occur?






39. From What embryonic layer does the epithelial linings of the oral cavity arise?






40. What causes the transposition of the great vessels? What does it result in?






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






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






43. What arises from the fourth aortic arch?






44. Which arches form the posterior 1/3 of the tongue?






45. What is perinauds syndrome?






46. What role does the placenta have?






47. What is hypoplasia? is primordial tissue present?






48. From where does the medulla form?






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






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