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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 enzyme of the purine salvage pathway is deficient in the following? - Selective T- cell immunodeficiency






2. What CNs arise from x The medulla?






3. What is the most common lethal AR disorder affecting white Americans?






4. What component of the ETC is inhibited by the following? - CO






5. Name the antimicrobial agent whose major side effect is listed - Teratogenicity






6. What Beta- blocker is also a membrane stabilizer?






7. What type of fatty acid is associated with a decrease in serum triglycerides and cardiovascular disease?






8. What are the pharmacologic effects seen sexually with x a1- Blockers?






9. What two substances stimulate Sertoli cells?






10. How many oogonia are present at birth?






11. Via what pathway is glycolysis increased after phagocytosis?






12. What two forces affect movement of ions across a membrane?






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






14. What toxicities are caused by the following agents? - Halothane






15. Which centrally acting a2- adrenergic agonist is used in the treatment protocol of opioid withdrawal?






16. Is ulcerative colitis or Crohn disease more commonly associated with primary sclerosing cholangitis?






17. Name the stages of sleep with these EEG patterns: x Delta waves






18. Name the macrophage based on its location: x Brain macrophages






19. Name the insulin preparation based on the peak effect and duration of action - Peak - 0.5 to 3 hours; duration - 5 to 7 hours






20. What rate removes any difference between two populations - based on a variable - to makes groups equal?






21. What is the most common one? - Neurotransmitter in the brain






22. What syndrome results if the enzyme ?-1- iduronidase is deficient? L- iduronate sulfatase deficiency?






23. What must be supplemented in patients with medium - chain acyl CoA dehydrogenase (MCAD) deficiency?






24. Name the most common type or cause - Diarrhea in children






25. Name the bony articulations of the following sites. Be specific - Shoulder






26. What antidepressant - which recently was approved for general anxiety disorder - inhibits the reuptake of NE and 5- HT?






27. Is the coding or the template strand of DNA identical to mRNA (excluding the T/U difference)?






28. What is the end product of purine catabolism?






29. Name four major risk factors for atherosclerosis.






30. What is the term for an inhibitory interneuron?






31. What enzyme requires molybdenum as a cofactor?






32. Where is most of the body's Ca2+ stored?






33. What disorder is characterized by autoantibodies to IF?






34. What do UMNs innervate?






35. All Proteus species are...






36. What determines the plasma level at steady state?






37. Name the most common type or cause - Pyogenic osteomyelitis






38. What CNs are affected if there is a lesion in x The upper medulla?






39. Name the form of spina bifida - An open neural tube lying on the surface of the back






40. What wave is the cause of the following venous pulse deflections? - The rise in right atrial pressure secondary to blood filling and terminating when the tricuspid valves opens






41. What is the most common one? - Form of arthritis






42. What is the most common one? - Site for atherosclerotic plaques in the abdominal aorta






43. Which hepatitis B serology markers






44. What syndrome has multiple adenomatous colonic polyps and CNS gliomas?






45. Name the area of the cerebral cortex affected by the description of the effects - symptoms - and results of the lesion - Denies being blind - cortical blindness

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46. Which form of melanoma carries the best prognosis?






47. What organ of the body has the smallest AV oxygen difference?






48. What three muscles constitute the erector spinae?

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49. What is the only DNA virus that has the reverse transcriptase enzyme?






50. Which leukotrienes are associated with the late - phase inflammatory response?