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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 syndrome is due to Abs directed to calcium channels and causes muscle weakness that improves with repeated use?






2. Acts as the vertebral body of C1 allowing lateral rotation of the head. The first cervical vertebra has no vertebral body.






3. What is the triad of Reiter syndrome?

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4. Name the MCC - Aspiration pneumonia in an alcoholic






5. What is the most common form of inherited dwarfism?






6. What is the term for the difference between the highest and the lowest score in a population?






7. Name the most common cause - Chronic pancreatitis






8. Which three organisms cause heterophilic negative mononucleosis?






9. If you double the infusion rate of a drug - how long will it take to reach steady state?






10. Which muscle of the eye is under sympathetic control?






11. Is an anti - HAV IgG Ab associated with immunization or recent infection?






12. Are elevated alkaline phosphatase and decreased phosphorus and calcium levels more consistent with osteoporosis or osteomalacia?






13. Does physiologic splitting of the first heart sound occur during inspiration or expiration? Why?






14. What Ig is associated with ADCC for parasites?






15. Name the lipoprotein based on the following characteristics - apo E - apo C- II - apoB-48






16. What tumor is seen in the 2- to 4-year - old age group; does not cross the midline; has immature glomeruli - tubules - and stroma; and metastasizes late to the lungs?






17. What specifies how accurately the sample values and the true values of the population lie within a given range?






18. What is the most common form of non - Hodgkin lymphoma in the United States?






19. What is the largest muscle in the body?






20. Name the lipoprotein based on the following characteristics - apo E - apo B-100 - apo C- II






21. Indicates the patient has active pulmonary disease.






22. Name the most common one - Chromosomal disorder involving sex chromosomes






23. Under resting conditions - What is the main determinant of cerebral blood flow?






24. What is the only pharyngeal muscle not innervated by CN X?






25. What area of the hypothalamus is responsible for recognizing an increase in body temperature and mediates the response to dissipate heat?






26. Which phenotype of osteogenesis imperfecta is incompatible with life?






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






28. In which quadrant is breast cancer most commonly found?






29. What Beta2- agonist is used as a prophylactic agent in the treatment of asthma?






30. Name the DNA virus: x Linear dsDNA; naked; replicates in the nucleus






31. Name the compartment of the mediastinum associated with the following thoracic structures: Esophagus






32. What basic reflex regulates muscle tone by contracting muscles in response to stretch of that muscle?






33. What complement factor or factors are associated with x Anaphylaxis?






34. What is the term for hypercalcemia resulting in precipitation of calcium phosphate in normal tissue?






35. What complement factor deficiency leads to x Increased susceptibility to pyogenic infections?






36. Name the lipoprotein based on the following characteristics - apo E






37. What are the four exceptions to requirements for informed consent?






38. In biostatistics - What are the three criteria required to increase power?






39. Name the ocular lesion; be specific - Left Meyer's loop lesion of the optic radiations.






40. What form of hormone is described as having membrane - bound receptors that are stored in vesicles - using second messengers - and having its activity determined by free hormone levels.






41. What wave is the cause of the following venous pulse deflections? - The contraction of the right atrium






42. Are contraindicated in patients with SCID.






43. What tract carries the ipsilateral dorsal column fibers from the lower limbs in the spinal cord?






44. The proportion of truly diseased persons in the screened population who are identified as diseased refers to?






45. What is the name of demyelination of the corticospinal tract and the dorsal column in the spinal cord due most commonly to a vitamin B12 deficiency?






46. Name the RNA subtype based on the following: x The most abundant form of RNA in the cell






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






48. What form of conditioning is defined as a new response to an old stimulus resulting in a consequence?






49. Name the phase of the eukaryotic cell cycle: x Period of DNA replication (preparing for mitosis)






50. Describe the loss for each of the following in a hemisection of the spinal cord. (Brown - S