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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 artery supplies the right atrium - right ventricle - sinoatrial and atrioventricular nodes?






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






3. Name the compartment of the lower extremity and the nerve based on its movements - Plantar flex the foot and evert the foot






4. Why is the liver unable to metabolize ketone bodies?






5. What organism is commonly associated with a cellulitis from an animal bite?






6. What protozoal parasite forms flasked - shaped lesions in the duodenum - is transmitted via fecal - oral route - and is commonly seen in campers who drank stream water?






7. What determines the rate of reaction?






8. What type of jaundice is seen in Dubin - Johnson syndrome?






9. What are the two factors that affect alveolar PCO2 levels?






10. What cycle is responsible for converting to glucose in the liver the lactate produced in the RBCs?






11. What sided muscle weakness is seen in an UMN corticospinal tract injury above the pyramidal decussation?






12. What is the FiO2 of room air?






13. What two AAs have a pKa of 4?






14. What aphasia is seen as an inability to comprehend spoken language and speaking in a word salad?






15. What subset of CD4 helper T cells stimulate B- cell division and differentiation?






16. Name the structure that enters or exits the following foramina: x Foramen ovale






17. What enzyme is inhibited by propylthiouracil (PTU)?

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18. What does hepatitis D virus need from hepatitis B virus to be infective?






19. What is the leading cause of school dropout?






20. What embryonic structure forms the adult male structure? - Urinary bladder - urethra - prostate gland - bulbourethral gland






21. What enzyme has a 5' to 3' synthesis of the Okazaki fragments - 3' exonuclease activity - and 5' exonuclease activity?






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






23. How many months in How many years must a person cough with copious sputum production for the diagnosis of chronic bronchitis to be made?






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






25. Name the DNA virus: x Partially dsDNA circular; enveloped; virion - associated polymerases; has RNA intermediate; replicates in the nucleus






26. What AD disease associated with chromosome 19 involves a defect in the LDL receptors that leads to skin and tendon xanthomas?






27. What are the pharmacologic effects seen sexually with x Beta- Blockers?






28. What generate anterograde transport of information in a neuron?






29. What nerve is compromised in carpal tunnel syndrome?






30. Is the carotid sinus sensitive to pressure or oxygen?

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31. When is the first arrested stage of development in the female reproductive cycle?






32. What is the most common one? - Vasculitis






33. What is the volume of distribution (increased or decreased) of a drug when a large percentage is protein bound?






34. What pneumoconiosis is associated with exposure to the following occupations or materials? - Miners - metal grinders - and sandblasters

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35. What hormone is characterized by the following renal effects? - Calcium reabsorption - phosphate reabsorption






36. What operant conditioning therapy or modification is described as x Removing a reinforcement (without the patient knowing) gradually over time to stop a condition?






37. An 80-year - old woman presents to you with right - sided temporal headache - facial pain and blurred vision on the affected side - and an elevated ESR. Your diagnosis?






38. In what disease is there a genetic absence of UDP- glucuronate transferase - resulting in an increase in free unconjugated bilirubin?






39. What is associated with prolonged lithium use?






40. What form of alcohol causes blindness?






41. Senile plaques






42. What picornavirus is associated with hand - foot - and - mouth disease?






43. What stage of sleep is associated with somnambulism?






44. What is the major inorganic component of bone?






45. What are the three characteristics of autoregulation?






46. 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






47. What renal disease in diabetic patients is seen as a halo of capillaries around the mesangial nodules?






48. What potentially fatal disease occurs in children who are given aspirin during a viral illness?






49. What negative sense RNA virus is associated with intracytoplasmic inclusion bodies called Negri bodies?






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







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