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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. Name the most common type or cause - Hypothyroidism in the United States






2. Clarke's nucleus is the second ascending sensory neuron of which spinocerebellar tract?






3. What disease that involves mental retardation - flat face - muscle hypotonia - and a double - bubble sign on radiograph poses an increased risk of Alzheimer's disease and All?






4. What is the term for taking an mRNA molecule and arranging the AA sequence forming a protein?






5. Which hepatitis B serology markers






6. As what compound do the carbons for fatty acid synthesis leave the mitochondria?






7. What two AAs have a pKa of 10?






8. Does REM deprivation interfere with performance on simple tasks?






9. What mast cell mediator is a chemotactic agent?






10. What AA has a pKa of 13?






11. What type of metal poisoning causes mental retardation - somnolence - convulsions - and encephalopathy?






12. What is the DOC for CMV retinitis?






13. From what pharyngeal pouch is the following structure derived? - Middle ear






14. Which prophylactic asthmatic agent is an antagonist of LTD4?






15. What is the term to describe a decrease in the cell size and function usually associated with disuse?






16. How many high - energy bonds does the cycle of elongation cost?






17. Regarding neuroleptics - What is the relationship between potency and anticholinergic side effects?






18. What hormone level peaks 1 day before the surge of LH and FSH in the female cycle?






19. What CNS developmental abnormality is associated with downward displacement of the cerebellar vermis and medulla compressing the fourth ventricle and leading to obstructive hydrocephalus?






20. What mineral deficiency in children is associated with poor growth and impaired sexual development?






21. Which anticonvulsant causes gingival hyperplasia?






22. Most sleep time is spent In what stage of sleep?






23. Name the ocular lesion; be specific - Right calcarine cortex lesion






24. What determines the effective osmolarity of the ICF and the ECF compartments?






25. Does the heart rate determine the diastolic or systolic interval?






26. What three substrates control the enzyme PEPCK for the conversion of oxaloacetate (OAA) to pyruvate in the cytoplasm?






27. What muscle of the middle ear is innervated by CN VII?






28. Are more Abs produced in a primary or a secondary immune response?






29. What antihistamine is used in the treatment of serotonergic crisis?






30. What are the four muscles of mastication?






31. How many days prior to ovulation does estradiol peak in the menstrual cycle?






32. What bacterium is diagnosed using the Dieterle silver stain?






33. What cell type in the bone is responsible for bone deposition?






34. What term describes the inability to recall personal information - commonly associated with trauma?






35. Name the three methods of vasodilation via the sympathetic nervous system.






36. Lucid interval






37. What artery travels with the following veins? - Great cardiac vein






38. What is the most common one? - Histologic variant of breast cancer






39. What oxygen - dependent killing enzyme requires hydrogen peroxide and halide (Cl -) to produce hypochlorous acid?






40. What syndrome has loss of deep tendon reflexes - muscle weakness - and ascending paralysis preceded by a viral illness?






41. A 20-year - old black woman goes to you with nonspecific joint pain - fever - and a malar rash over the bridge of her nose and on her cheeks. This is a classic example of What autoimmune disease? What are three autoantibody tests you could order to m






42. What is the most common one? - Type of ASD






43. What is the only Plasmodium that is quartan?






44. Name the type of graft described by these transplants: x From one site to another on the same person






45. When is the surface tension the greatest in the respiratory cycle?






46. What is the most common Ig deficiency?






47. What is the most common one? - Cardiac tumor






48. What is the most common one? - Benign lesion that affects the breast






49. Name the antimicrobial agent whose major side effect is listed - Cholestatic hepatitis






50. What is the formula to calculate IQ?