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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 is the fastest - conducting fiber of the heart? Slowest conduction fiber in the heart?






2. Anatomical and alveolar dead spaces together constitute what space?






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






4. What stromal tumor in males is characterized histologically with crystalloids of Reinke?






5. What two Beta2- agonists cause myometrial relaxation?






6. A patient has to prove his or her...






7. What two viruses get their envelope not from budding but from coding?






8. In the alveoli - what cell type is x responsible for producing surfactant?






9. What epidermal layer's function is to release lipids to act as a sealant?






10. What AA is a precursor of the following substances? - Creatine






11. What condition is characterized by a 46XY karyotype - testes present - and ambiguous or female external genitalia?






12. How can a deficiency in adenosine deaminase be a bone marrow suppressor?






13. Where in the GI tract does the reabsorption of bile salts take place?






14. What form of anxiety - appearing at 6 months - peaking at 8 months - and disappearing by 1 year of age - is seen in the presence of unfamiliar people?






15. What branch off the vertebral artery supplies x The cerebellum and the dorsolateral part of the medulla?






16. What is the MCC of death in black males aged 15 to 24?






17. Name the type of regeneration (i.e. - labile - stable - or permanent) based on the following examples - Liver






18. What is it called when levels of sex steroids increase - LH increases - and FSH increases?






19. A patient with a history of epilepsy goes to the ER with sedation - gait ataxia - diplopia - and vertical nystagmus. Which anticonvulsant overdose resulted in the patient's symptoms?






20. Which three CNs send sensory information to the solitary nucleus?






21. What type of erythema do you see in x Rheumatic fever?






22. What are the three microscopic pathologic changes seen in Alzheimer's disease?






23. The surge of what hormone induces ovulation?






24. Why is the cell's resting membrane potential negative?






25. Which of the following is not a risk factor for cholesterol gallstones: pregnancy - OCP use - female gender - hemolytic anemia - cirrhosis - and obesity? (May be more than one answer.)






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






27. The faster the ___________ - the smaller the time of maximum concentration (Tmax) and the maximum concentration (Cmax).






28. Name the antidote - Carbon monoxide (CO)






29. What is the most common fungal infection in HIV?






30. Name the compartment of the lower extremity and the nerve based on its movements - Extend the hip and flex the knee






31. What is the major hormone produced in the following areas of the adrenal cortex? - Zona fasciculata






32. What form of the Plasmodium species is ingested by mosquitoes?






33. Are the following major or minor Jones criteria of rheumatic fever? - Pericarditis






34. Which acid - fast rod is an obligate intracellular parasite?






35. What enzyme is blocked by methotrexate/ trimethoprim?






36. What vasculitis is characterized by systemic vasculitis in small to medium - size vessels (except the lung); affecting young males; 30% HBsAg - positive; P- ANCA and autoantibodies against myeloperoxidase?






37. What Ab is an indication of low transmissibility for hepatitis?






38. What CN is associated with the sensory innervation of x Oropharynx?






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






40. Which bacteria are associated with the following pigment production? - Black - gray pigmentation






41. What enzyme of heme synthesis is deficient in the autosomal dominant disorder acute intermittent porphyria?






42. What happens to blood flow and pressure downstream with local arteriolar constriction?






43. WBC casts in the urine






44. What complement factor deficiency leads to x Recurrent gonococcal infections?






45. Which tetracycline is used to treat prostatitis because it concentrates strongly in prostatic fluid?






46. What DNA virus is associated with exanthem subitum (roseola)?






47. Name these narcissistic defense mechanisms: x Person takes his or her own feelings - beliefs - wishes - and so on and thinks they are someone else's. (e.g. - a cheating man thinks his wife is unfaithful)






48. What is the primary risk factor for suicide?






49. Which cestode infection results in alveolar hydatid cyst disease?






50. What is the relationship between chance of error and x Standard deviation?