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USMLE Step 1 Prep

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 test uses very small amounts of DNA that can be amplified and analyzed without the use of Southern blotting or cloning?






2. Name the antidote - Methyl alcohol






3. What is the term for involuntary constriction of the outer third of the vagina to prevent penile penetration?






4. Name the associated chromosome - Marfan disease






5. What three substances stimulate parietal cells?






6. What malabsorption syndrome produces abdominal distention - bloating - flatulence - diarrhea - steatorrhea - and weight loss shortly after eating bread products?






7. What is the name for the following RBC indices? - The coefficient of variation of the RBC volume






8. What CN carries preganglionic parasympathetic fibers that innervate the viscera of the neck - thorax - foregut - and midgut?






9. Name the primary vesicle the following structures are derived from (proencephalon - mesencephalon - or rhombencephalon) - Telencephalon






10. What three bacteria are positive to quellung reactive test?






11. Name the period described by the following statement: no matter how strong a stimulus is - no further action potentials can be stimulated.






12. What restriction endonuclease site is destroyed in sickle Beta- globin allele?






13. What antihistamine is used in the treatment of serotonergic crisis?






14. What is the term for fibrinoid necrosis of the arterioles in the kidney secondary to malignant hypertension?






15. What two receptors in the chemoreceptor trigger zone lead to vomiting when stimulated?






16. What is the term for the point on a scale that divides the population into two equal parts?






17. Where does the parotid (Stensen's) duct enter the oral cavity?






18. Do the following structures pick up stain from hematoxylin or eosin? - RBCs






19. What class 1A antiarrhythmic agent has SLE- like syndrome side effect in slow acetylators?






20. The first area affected during hypoxia.






21. What component of the ETC is inhibited by the following? - Oligomycin






22. The closure of what valve indicates the beginning of the isovolumetric relaxation phase of the cardiac cycle?






23. Name the lung measurement based on the following descriptions: x Amount of air in the lungs after maximal expiration






24. What is the drug of choice in treating a patient with hyperuricemia due to underexcretion of uric acid?






25. Name the type of regeneration (i.e. - labile - stable - or permanent) based on the following examples - Pancreas






26. Name the lung measurement based on the following descriptions: x Additional volume that can be expired after normal expiration






27. What type II hypersensitivity disorder is defined as x Autoantibodies directed against platelet integrin?






28. Name the area of the cerebral cortex with the function described: x Skill - based memory - verbal recall - balance - refined voluntary movements






29. Name the cluster C personality disorder: x Sensitive to criticism - shy - anxious; socially isolated but yearns to be in the crowd






30. In what organelle does the TCA cycle occur?






31. Bloody tap on lumbar puncture






32. What is the primary end product of pyrimidine synthesis?






33. Name the area of the cerebral cortex affected by the description of the effects - symptoms - and results of the lesion - Denies being blind - cortical blindness

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34. What is the term for the same results achieved again on testing a subject a second or third time?






35. Name the most common cause - Croup






36. What is the term for a twisting of the bowel around its vascular axis resulting in intestinal obstruction?






37. At what stage of cognitive development (according to Piaget) do children x Lack law of conservation and be egocentric?






38. Name the area of the cerebral cortex with the function described: x Language - memory - and emotion (Hint: herpesvirus infects here commonly)






39. Match the chromosome and haploid number with the stage of sperm development - spermatid - spermatocyte (primary or secondary) - spermatogonia (type A or B): x 23/1n






40. Do the following structures pick up stain from hematoxylin or eosin? - Calcium






41. What form of bilirubin can cross the blood - brain barrier?






42. What is the most common one? - Pituitary tumor






43. What substrate gets built up in Gaucher's disease?






44. What is the most common one? - Germ cell tumor in boys






45. What Beta- blocker is also a membrane stabilizer?






46. What is the major hormone produced in the following areas of the adrenal cortex? - Zona glomerulosa






47. To what host cell receptor does the rabies virus attach?






48. What is the only DNA virus that does not replicate its DNA in the nucleus of the host cell?






49. Why would a puncture to a vein above the heart have the potential to introduce air into the vascular system?






50. What is the first Ab a baby makes?






Can you answer 50 questions in 15 minutes?



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