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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 is the DOC for CMV retinitis?






2. Metformin is contraindicated in ________ because of weight gain as its side effect.






3. What type of cerebral bleed is due to a rupture of a berry aneurysm in the circle of Willis?






4. What parasympathetic nucleus is found on the floor of the fourth ventricle and supplies preganglionic fibers innervating the terminal ganglias of the thorax - foregut - and midgut?






5. What are the five hormones produced by Sertoli cells?






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






7. Which four bacteria require cysteine for growth?






8. Name the associated chromosome - Marfan disease






9. Increased levels of what neurotransmitter - in the hippocampus - decrease the likelihood of learned helplessness?






10. Males are more likely to develop _______ than females.






11. How many pairs of spinal nerves are associated with x Sacral vertebrae?






12. Which form of melanoma carries the worst prognosis?






13. What adrenal enzyme deficiency can be summed up as a mineralocorticoid deficiency - glucocorticoid deficiency - and an excess of adrenal androgens?






14. Is CO2 a perfusion - or diffusion - limited O2 gas?






15. What disease involves microcephaly - mental retardation - cleft lip or palate - and dextrocardia?






16. What family do the following viruses belong to? - Ebola






17. Are the following conditions associated with a negative or positive nitrogen balance? - Infection






18. More Ag is needed to produce a ____________ than a first immune response.






19. What is the only nonmotile pathogenic Clostridium species?






20. Name the stages of sleep with these EEG patterns: x Sleep spindles - K- complexes






21. Arrange the following layers in the correct sequence through which a needle must pass in a lumbar puncture - Skin x Subarachnoid space x Interspinous ligament x Dura mater x Deep fascia x Epidural space x Superficial fascia x Interlaminar space x Su






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






23. What branch of the immune system is acquired in response to an Ag?






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






25. What are the five AAs that are both ketogenic and glucogenic?






26. Four - fifths of those who attempt suicide first...






27. Name the cancer associated with the following chemical agents. (Some may have more than one answer.) x Polycyclic aromatic hydrocarbons






28. Which thrombolytic agent - activated in the presence of fibrin - is manufactured by recombinant DNA process?






29. Call - Exner bodies






30. T3 increases bone ossification through synergistic effect with what hormone?






31. What are the four posttranslational modifications done by the Golgi apparatus?






32. What is the DOC for the following protozoal infections? - Amebiasis






33. What type of skin carcinoma occurring on sun - exposed sites has a low level of metastasis?






34. Name the MCC of death - In SLE






35. What is the term for repetitive actions blocking recurring bad thoughts?






36. What is the term for an increase in the number of cells in a tissue?






37. What is the central chemoreceptor's main drive for ventilation?






38. What two requirements must be met for the Lac operon to be activated?






39. Are the following major or minor Jones criteria of rheumatic fever? - Arthralgias






40. What is the amount in liters and percent body weight for the following compartments? - ICF






41. Which dimorphic fungus is endemic in the Ohio - Mississippi - Missouri - and Eastern Great Lakes - is found in soil with bird and bat feces - and is associated with infections in spelunkers and chicken coop cleaners?






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






43. Are contraindicated in patients who present to the hospital with CHF.






44. What Brodmann area is associated with x Premotor cortex?






45. Are used in diagnosing CREST syndrome.






46. Name the compartment of the mediastinum associated with the following thoracic structures: Thoracic duct






47. What operant conditioning therapy or modification is described as x Having a stimulus take over the control of the behavior (unintentionally)?






48. What are the four muscles of mastication?






49. What two vitamins are inactivated when they come in contact with acetaldehyde?






50. What aspects of sleep are affected during benzodiazepine use?







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