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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. Which thalamic nucleus receives auditory input from the inferior colliculus?






2. What endogenous pigment found in the substantia nigra and melanocytes is formed by the oxidation of tyrosine to dihydroxyphenylalanine?






3. What serotonin reuptake inhibitor's major sexual side effect is priapism?






4. What organism causes Q fever?






5. What is the antidote for organophosphate ingestion?






6. What is the largest nucleus in the midbrain?






7. With What two pathologies is a honeycomb lung associated?






8. What chronic inflammatory WBC is associated with IgE- mediated allergic reactions and parasitic infections?






9. What area of the posterior aspect of the eye has no photoreceptors?






10. What myeloid disorder is characterized by increased hematocrit - blood viscosity - basophils - and eosinophils; intense pruritus; and gastric ulcers due to histamine release from basophils - increased LAP - and plethora?






11. Name the most common type or cause - Noniatrogenic hypothyroidism in the United States






12. What three cephalosporins inhibit vitamin K- dependent factors?






13. What neurotransmitter is presynaptically inhibited by reserpine and guanethidine?






14. Pseudorosettes






15. What is the most common one? - Renal cell cancer type






16. What hormone's release is strongly associated with stage 4 sleep?






17. Name the antimicrobial agent whose major side effect is listed - Teratogenicity






18. Which major cell type is found in the red pulp of the spleen?






19. What enzyme is inhibited by sulfonamides?






20. What disorder of aldosterone secretion is characterized by x Increased total body sodium - ECF volume - plasma volume - BP - and pH; decreased potassium - renin and AT II activity; no edema?






21. What enzyme catalyzes the reversible oxidative deamination of glutamate and produces the TCA cycle intermediate a - ketoglutarate?






22. Multiple pregnancies - early age of intercourse - multiple sexual partners - OCP use - smoking - HIV - and STDs.






23. Name the cancer associated with the following tumor markers. (Some may have more than one answer.) x CA-125






24. What artificial sweetener must patients with PKU avoid?






25. What benign solitary papillary growth within the lactiferous ducts of the breast commonly produces bloody nipple discharge?






26. Name the structure that enters or exits the following foramina: x Hypoglossal canal






27. Name the Hgb - O2 binding site based on the following information: x Greatest affinity of the three remaining sites for attachment; requires PO2 levels of 26 mm Hg to remain attached






28. Lucid interval






29. What enzyme is deficient in selective T cell immunodeficiency?






30. What hormone controls relaxation of the lower esophageal sphincter during swallowing?






31. What AD disorder is characterized by degeneration of GABA neurons in the caudate nucleus resulting in atrophy - chorea - dementia - and personality changes?






32. What is the term for the syndrome consisting of hepatomegaly - ascites - and abdominal pain due to hepatic vein thrombosis?






33. What scale has a true zero point - graded into equal increments - and also orders them?






34. What purine base is contained in inosine monophosphate?






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






36. Which type of hepatitis is a calicivirus?






37. Name the compartment of the mediastinum associated with the following thoracic structures: Thymus






38. In high altitudes - What is the main drive for ventilation?






39. What ovarian disease involves psammoma bodies?






40. What Brodmann area is associated with x Primary motor cortex?






41. What antihypertensive agent produces cyanide and thiocyanate as byproducts?






42. Eating fava beans can produce the Mediterranean type of what deficiency?






43. What is the term for vitamin D deficiency prior to epiphyseal fusion?






44. 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?






45. Name the RNA subtype based on the following: x RNA molecules with enzymatic activity






46. Name the cancer associated with the following tumor markers. (Some may have more than one answer.) x Calcitonin






47. What are the two broad - spectrum penicillins?






48. Being college educated increases a man's risk of having...






49. Results in vitamin B12 malabsorption.






50. Which of the following Enterobacteriaceae family members