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






2. Where is the mothers blood located in the placenta?






3. From What embryonic layer do the parafollicular cells of the thyroid arise?






4. From which germlayer does the thyroid develop?? From what structure exactly?






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






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






7. Pyloric stenosis is characterized by _____________ of muscularis externis in the sphincter






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






9. When does organogenesis occur?






10. What is jejunal - ileal - colonic atresia usually due to? What do you see on x ray?






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






12. what closes the interventricular foramen?






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






14. How is amniontic fluid excreted? How is amniotic fluid resorped?






15. From What embryonic layer do the ANS arise?






16. Which branchial apparatus develops into the inferior parathyroids?






17. What does the ductus arteriosus shunt blood away from - to where? What is its remnant?






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






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






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






21. What is used to keep the PDA open?






22. What day is the chorion formed?






23. What teratogen can cause an absence of digits amongst other things in the fetus? give an example.






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






25. what muscles are derived from branchial arch 6? CN?






26. Only _______________________________ are associated with neural tube defects






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






28. what week do the genitalia start to have male/female characteristics? What trimester is that?






29. From What embryonic layer does the gut tube epithelium arise?






30. From where does the pulmonary arteries and the ductus arteriosus arise?






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






32. What secretes hCG?






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






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






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






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






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






38. The spinal cord is made from...






39. What germ layer correlates with the branchial pouches?






40. From What embryonic layer is the kidney and the adrenal cortex from?






41. How many umbilical arteries are there? How many umbilical veins?






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






43. What is the kidney that functions at the interim kidney in the 1st trimester? What does it later contribute to?






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






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






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






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






48. What causes urine discharge from the umbilicus?






49. From where is amniotic fluid produced? other than electrolytes and carbs - what else does it contain?






50. From where does the medulla form?