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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 tetracycline is associated with vestibular toxicity?






2. What operant conditioning therapy or modification is described as x Stopping the reinforcement that is leading to an undesired behavior?






3. Name the compartment of the mediastinum associated with the following thoracic structures: Pulmonary artery and veins






4. Name the type of graft described by these transplants: x From one species to another






5. Name the stages of sleep with these EEG patterns: x Sawtooth waves - random low voltage pattern






6. What capsular serotype is associated with Escherichia coli - induced meningitis?






7. Which type of hepatitis is a picornavirus?






8. What is the epithelial lining of the prostatic portion of the urethra?






9. What lymphoid organ has the following characteristics: outer and inner cortical areas - encapsulation - germinal centers - and high endothelial venules?






10. Which organism causes trench fever?






11. What somatomedin serves as a 24- hour marker of GH secretion?






12. From What aortic arch are the following structures derived?






13. From What aortic arch are the following structures derived?






14. Name the most common type or cause - Acute metal poisoning in the United States






15. Name the most common cause - Dementia in persons aged 60 to 90 years






16. What are the following changes seen in the luminal fluid by the time it leaves the PCT of the nephron? - Concentration of CHO - AA - ketones - peptides






17. What endocrine abnormality is characterized by the following changes in PTH - Ca2+ - and inorganic phosphate (Pi)? - PTH decreased - Ca2+ decreased - Pi increased






18. Can an acute MI be diagnosed only by looking at an ECG?






19. What three vitamin deficiencies are associated with homocystinemia?






20. What complement factor or factors are associated with x Opsonization?






21. How many pairs of spinal nerves exit from the spinal cord?






22. Are used in diagnosing CREST syndrome.






23. What CN transmits sensory information from the cornea?






24. What syndrome is due to a deficiency of surfactant?






25. What is the name of hydrophilic pores that allow the direct passage of ions and particles between two adjacent cells?






26. What Ab is an indication of low transmissibility for hepatitis?






27. What organism is associated with the following types of diarrhea? Day care - associated diarrhea in infants






28. What are the three sites where CSF can leave the ventricles and enter the subarachnoid space? (Name the lateral and the medial foramina.)






29. What vein is formed by the union of the right and left brachiocephalic veins?






30. Calf pseudohypertrophy






31. What determines the Vmax of skeletal muscle?

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32. Name these immature defense mechanisms: x Inability to remember a known fact (aware of forgetting)






33. Name the most common type or cause - Lung abscess






34. What nerve or nerves supply general sensation and taste to the posterior third of the tongue?






35. Name the Plasmodium species based on the following information:Persistent hypnozoite liver stage with relapses; blood smear shows amoeboid trophozoites with oval - jagged infected RBCs; 48- hour fever spike pattern






36. What nerve and artery could be affected in a midshaft humeral fracture?






37. Which mycoplasma species is associated with urethritis - prostatitis - and renal calculi?






38. What cells of the epidermis - derived from the neural crest - act as mechanoreceptors?

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39. If the ratio of a substance's filtrate and plasma concentrations are equal - What is that substance's affect on the kidney?






40. Inhibition of peripheral aromatic amino acid decarboxylase and increased CNS availability of L- dopa are results of what drug used in the treatment of Parkinson's disease?






41. What is the size of a positive PPD test for the following? (Reactive) x Patient with AIDS






42. What water - soluble vitamin deficiency results in pellagra?






43. What eukaryotic translation enzyme is associated with the following: x Termination






44. Name the cancer associated with the following oncogenes. (Some may have more than one answer) x hst -1 - int -2 - erb -2 - and erb -3






45. What disease has multiple schwannomas - caf






46. What four substances increase the rate of gluconeogenesis?






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






48. Hereditary angioneurotic edema (AD) produces local edema in organs (e.g. - GI - skin - respiratory tract). What enzyme deficiency causes increased capillary permeability due to a release of vasoactive peptides?






49. What normochromic - normocytic AD anemia has splenomegaly and increased osmotic fragility?






50. What embryonic structure forms the adult male structure? - Ventral part of the penis