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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 mushroom poisoning is associated with fulminant hepatitis with extensive liver necrosis?






2. What type of hypersensitivity is a result of high circulating levels of soluble immune complexes made up of IgG or IgM Abs?






3. What hormone - produced by Sertoli cells - if absent would result in the formation of internal female structures?






4. What tract carries the ipsilateral dorsal column fibers from the upper limbs in the spinal cord?






5. IgE- mediated mast cell release - C3a and C5a - and IL-1 all trigger the release of what vasoactive amine?






6. What enzyme is essential for the conversion of CO2 to HCO3-?






7. What are the first signs of overdose from phenobarbitals?






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






9. What is the most common one? Site of congenital diaphragmatic hernias






10. Name the most common one - Chromosomal disorder






11. What is the term for occlusion of a blood vessel due to an intravascular mass that has been carried downstream?






12. Are modified skeletal muscle fibers. They are the sensory component of the stretch reflexes.






13. What type of hepatitis has the highest mortality rate among pregnant women?






14. What naturally occurring substances mimic the effects of opioids?






15. What autoimmune disorder is due to Abs directed to ACh receptors at the NMJ?






16. What mixed a - antagonists are used for patients with pheochromocytoma?






17. Name the aphasia based on these characteristics: x Nonfluent speech - telegraphic and ungrammatical; lesion in Brodmann's area 44; unimpaired comprehension

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18. What is the name for the following RBC indices? - The coefficient of variation of the RBC volume






19. When does cortisol secretion peak?






20. What is the primary predisposing factor for vascular dementia?






21. What hematological malignancy is particularly likely to affect patients with Down syndrome?






22. What component of the basement membrane binds to collagen type IV and heparin sulfate and is a cell surface receptor?






23. What type of correlation is defined as x Two variables that go together in the same direction?






24. What is the most common one? - Complication of PDA






25. What selective Cox-2 inhibitor should be avoided in patients with a history of sulfonamide allergy?






26. What is the term for the heart's inability to maintain perfusion and meet the metabolic demands of tissues and organs?






27. As what AAs do muscles send nitrogen to the liver?






28. What is the start codon - and What does it code for in eukaryotes? Prokaryotes?






29. What water - soluble - vitamin deficiency may result from eating raw eggs?






30. What is the most common one? - Malignant tumor of the breast






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






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






33. Name the eukaryotic RNA polymerase based on the following: x Synthesizes tRNA - snRNA - and the 5S rRNA






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






35. Name the associated chromosome - Albinism






36. What microaerophile is a motile gram - negative curved rod with polar flagella that causes infectious diarrhea at low doses (<500)?






37. What is the PO2 of aortic blood in fetal circulation?






38. What is the most common causative organism of acne vulgaris?






39. Do newborns have a preference for still or moving objects?






40. Name the structure that enters or exits the following foramina: x Internal auditory meatus






41. Cherry red intoxication is associated with what form of poisoning?






42. What case is best known for use of the 'best interest standard'?

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43. Name the RNA subtype based on the following: x Found only in the nucleus of eukaryotic cells and are precursors of mRNA






44. What hypothesis states that the findings of a test are a result of chance?






45. What two forms of insulin - if mixed together - precipitate zinc?






46. Has no underlying pathology.

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47. Name the cerebral vessel associated with the following vascular pathologies - Epidural hemorrhage






48. What nonmotile gram - negative - non - lactose - fermenting facultative anaerobic rod uses the human colon as its only reservoir and is transmitted by fecal - oral spread?






49. Causes of avascular necrosis of bone.






50. Which cestode in raw or rare beef containing cysticerci results in intestinal tapeworms?