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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. Have analgesic - antipyretic - anti - inflammatory - and antiplatelet activities.






2. Name the three postganglionic sympathetic ganglia that receive input from thoracic splanchnics.

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3. What blotting technique uses the following for analysis? - RNA






4. Name the laryngeal muscle described by the following: x Tenses the vocal ligaments - increasing the distance between the cartilages - thereby increasing the pitch






5. Name the compartment of the mediastinum associated with the following thoracic structures: Left subclavian artery






6. What percentage of children born to HIV- positive mothers will test positive for HIV at birth?






7. Name the associated chromosome - Chronic lymphocytic leukemia (CLL)






8. Neurofibrillary tangles






9. Name the cluster C personality disorder: x Orderly - inflexible - perfectionist; makes rules - lists - order; doesn't like change - has a poor sense of humor - and needs to keep a routine






10. The left subclavian artery is a branch of What artery?






11. Require NaCl in its growth medium.






12. Which subset of MEN syndrome is associated with the following? - Medullary carcinoma of the thyroid - pheochromocytoma - and mucocutaneous neuromas






13. What type of scheduled reinforcement states that after a desired response - the reinforcement is given x On a set time schedule?






14. Name the MCC - Aspiration pneumonia in an alcoholic






15. What small gram - positive - non - spore - forming rod is a facultative intracellular parasite that grows in the cold and is associated with unpasteurized milk products?






16. Name the four components of the narcoleptic tetrad.






17. What cell in chronic inflammation is derived from blood monocytes?






18. Avidin decreases the absorption of what vitamin?






19. How much dietary iodine is necessary to maintain normal thyroid hormone secretion?






20. Name the B- cell CD marker: x Receptor for EBV






21. The clearance of what substance is the gold standard of GFR?






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






23. What female genital tract disorder is characterized by obesity - hirsutism - infertility - amenorrhea - elevated LH and testosterone levels - and low FSH levels?






24. Name the most common type - Specific phobia






25. Measles - mumps - varicella zoster - and Francisella tularensis.






26. What are the two functions of the thymus in T- cell differentiation?






27. What tract carries unconscious proprioceptive information from the Golgi tendon organs and muscle spindles to the cerebellum - helping monitor and modulate muscle movements?






28. Based on operant conditioning - What type of reinforcement is described when x Adding a stimulus reinforces a behavior?






29. What is the main factor determining GFR?






30. What disease is seen in the 20- to 40-year - old age group - is more prevalent in women than men - involves diarrhea with or without bloody stools - starts in the rectum and ascends without skipping areas - includes pseudopolyps - and has a thickness






31. Name the antidote - Ethylene glycol






32. What hormone has the following effects: chondrogenic in the epiphyseal end plates of bones; increases AA transport for protein synthesis; increases hydroxyproline (collagen); and increases chondroitin sulfate synthesis?






33. What is the major muscle used in the relaxed state of expiration?






34. Protein production - bile secretion - detoxification - conjugation - and lipid storage.






35. What happens to the resistance of the system when a resistor is added in a series?






36. What cerebral vessel size is affected in patients with vascular dementia?






37. What is the region of the fallopian tube where fertilization most commonly occurs?






38. What form of bias is due to false estimates of survival rates?

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39. What viral infection in patients with sickle cell anemia results in aplastic crisis?






40. What phase of Food and Drug Administration approval tests x The efficacy and occurrence of side effects in large group of patient volunteers?






41. What is the most common one? - Tumor arising within the bone






42. Name the hepatitis virus based on the following information - Enveloped RNA flavivirus






43. What seronegative spondyloarthropathy is seen in HLA- B27- positive young females and presents with the triad of conjunctivitis - urethritis - and arthritis affecting the knees and ankles?






44. What lysosomal enzyme is deficient in x Tay- Sachs disease?






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






46. What are the three causes of normochromic normocytic anemia with a normal MCV and a low reticulocyte count?






47. What drug - if given during pregnancy - would cause the uterus to exhibit signs of progesterone withdrawal and induce an abortion?






48. With a decrease in arterial diastolic pressure - what happens to x TPR?






49. What is the most common one? - Primary malignant tumor of the lungs






50. Goodpasture Ag is a component of What type of collagen?