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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. Name the correct artery - The right recurrent laryngeal nerve passes around it.






2. What statistical method do you use when analyzing x Case control studies?






3. Regarding neuroleptics - What is the relationship between potency and anticholinergic side effects?






4. Has proteolytic metabolic effects.






5. What is the term for the number of new events occurring in a population divided by the population at risk?






6. What purine base is contained in inosine monophosphate?






7. What is the term for white retinal spots surrounded by hemorrhage? In what condition are they seen?






8. In the classical conditioning model - when a behavior is learned - what must occur to break the probability that a response will happen?






9. Of what serotonin receptor is sumatriptan an agonist?






10. Based on operant conditioning - What type of reinforcement is described when x Removing a stimulus stops a behavior?






11. Do you monitor heparin's therapeutic levels by PT or PTT?






12. What regulates the rate of ketone body formation?






13. Why is the apex of the lung hypoventilated when a person is standing upright?






14. What is the most common primary malignant tumor in bone?






15. What is the term for headaches - inability to concentrate - sleep disturbances; avoidance of associated stimuli; reliving events as dreams or flashbacks following a psychologically stressful event beyond the normal range of expectation?






16. What neuronal cell bodies are contained in the intermediate zone of the spinal cord? (T1- L2)






17. What cells are atypical on a peripheral blood smear in heterophil - positive mononucleosis?






18. Which antimicrobial class may cause tooth enamel dysplasia and decreased bone growth in children?






19. What are effects of PTH in the kidney?






20. Name the MCC of death - In SLE






21. What MHC class of antigens do all nucleated cells carry on their surface membranes?






22. What is the most common one? - Testicular tumor in infants and children






23. What right - to - left shunt occurs when the aorta opens into the right ventricle and the pulmonary trunk opens into the left ventricle?






24. What diseases are associated with the HLA- B27 allele

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25. What small - facultative gram - negative intracellular rod's transmission is associated with unpasteurized dairy products and undulant fever?






26. Why does carbon monoxide diffusion in the lung (DLCO) decrease in emphysema and fibrosis but increase during exercise?






27. How early can a pregnancy be detected by hCG assays in the blood? In urine?






28. What syndrome is rheumatoid arthritis with pneumoconiosis?






29. Is digoxin or digitoxin renally eliminated?






30. Which tetracycline is used to treat prostatitis because it concentrates strongly in prostatic fluid?






31. What area of the brain acts as the center for contralateral horizontal gaze?






32. How many mature sperm are produced by one type B spermatogonium?






33. What are the five Ig isotypes?






34. Name the type of exudate - given the following examples - Uremic pericarditis






35. What urinary metabolite is elevated in pheochromocytoma?






36. Regarding the Lac operon - for What do the following genes code? - I gene






37. Name the type of graft described by these transplants: x From one site to another on the same person






38. What is the most common disease or infection reported to the CDC?






39. What is the major ketone body produced during alcoholic ketoacidosis?






40. What are the five terminal branches of the facial nerve?






41. What enzyme is deficient in the following glycogen storage disease? - Hers' disease






42. What CNs are affected if there is a lesion in x The upper medulla?






43. A complete opposite expression of your inward feeling (e.g. - arguing all the time with someone you are attracted to when your feelings are not known)






44. Is encapsulated.






45. Where is lithium metabolized and excreted?

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46. Name the cancer associated with the following chemical agents. (Some may have more than one answer.) x Benzenes






47. What is the term for a large - immature RBC that is spherical - blue - and without a nucleus?






48. What is the most common one? - Location of a gastric ulcer






49. How many covalent bonds per purine - pyrimidine base pairing are broken during denaturation of dsDNA?






50. Abs to what hepatitis B Ag provide immunity?