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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 nerves provide sensory innervation above the vocal cords? Below the vocal cords?






2. From What embryonic structure are the following structures derived? - The sinus venarum - coronary sinus - and the oblique vein of the left atrium






3. What is the term for the strength of association between multiple Abbinding sites and multiple antigenic determinants?






4. What fungus is seen as colored cauliflower lesions?






5. What are the following changes seen in the luminal fluid by the time it leaves the PCT of the nephron? - Percentage of original filtered volume left in the lumen






6. Which type of hepatitis can cause hepatocellular carcinoma?






7. Why is spermatogenesis decreased with anabolic steroid therapy?






8. What AR CNS disorder presents early in childhood with gait ataxia - loss of deep tendon reflexes - impaired vibratory sensation - hand clumsiness - and loss of position sense?






9. Which antimicrobial agent is used with pyrimethamine to treat toxoplasmosis?






10. What is the term for pus in the pleural space?






11. What IL is important in myeloid cell development?






12. What enzyme of the purine salvage pathway is deficient in the following? - SCID






13. Why is there an increase in prolactin if the hypothalamic - pituitary axis was severed?






14. What three organs are responsible for peripheral conversion of T4 to T3?

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15. Which bacteria are associated with the following pigment production? - Pyocyanin (blue - green)






16. What pulmonary disease - most commonly associated with smoking - results in enlarged - overinflated lungs owing to the destruction of the alveolar walls with diminished elastic recoil?






17. Do the following structures pick up stain from hematoxylin or eosin? - Collagen






18. What nucleus of the hypothalamus is the satiety center - regulating food intake?






19. What dementia is associated with dilated ventricles with diffuse cortical atrophy - decreased parietal lobe blood flow - and a decrease in choline acetyl transferase activity?

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20. What is the most common one? - Brain tumor






21. What is the most common one? - Joint affected in pseudogout






22. What hormone disorder is characterized by the following abnormalities in sex steroids? - LH? - and FSH?? - Sex steroids - LH - FSH






23. To What does failure to resolve separation anxiety lead?






24. Depolarization of the postsynaptic membrane...






25. What phase of the cell cycle are the following antineoplastic agents specific for? - Nitrosoureas






26. What is the most common one? - Location of ependymomas in children






27. What enzyme is deficient in alkaptonuria?






28. What encephalitis is associated with the JC virus?






29. What type of binding occurs with one Fab or one idiotype of IgG?






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






31. How much of a vessel must be stenosed to cause sudden cardiac death?






32. Name the most common type or cause - Urethritis in a young - newly sexually active individual






33. What disease caused by decompression sickness leads to multiple foci of ischemic necrosis that affect the head of the femur - humerus - and tibia?






34. Are necessary for normal menstrual cycles.






35. What is the most common one? - Viral cause of myocarditis






36. What does the tunica intima of arteries have that veins do not?






37. What is the most common organ involved in amyloidosis?






38. Name the product or products of arachidonic acid: x Vasodilation - bronchospasm - and increased vascular permeability






39. Name the most common type or cause - Infantile bacterial diarrhea






40. Which class of antihypertensives is used in the treatment of BPH?






41. What is the DOC for CMV retinitis?






42. What cell type is commonly elevated in asthma?






43. What is the most common site for implantation of the blastocyst?






44. What thalamic relay nucleus do the mammillary bodies project to?






45. How does the sympathetic nervous system affect insulin secretion?






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






47. Patients with sickle cell anemia are at increased risk for infection From what type of organisms?






48. What five factors promote turbulent flow?






49. A chronic alcohol abuser goes to the ER with weakness - a sore - beefy red tongue - loss of vibration and position sense - arm and leg dystaxia - elevated levels of methylmalonic acid in the urine - and anemia with an MCV above 105 fL. What is your d






50. What glycoprotein in the HIV virus is used for fusion?