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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 embryonic structure forms the adult female structures? - Glans clitoris - corpus cavernosus - and spongiosum






2. What cardiomyopathy is due to a ventricular outflow obstruction as a result of septal hypertrophy and leads to sudden cardiac death in young athletes?






3. What component of the ETC is inhibited by the following? - Cyanide






4. Name the primary vesicle the following structures are derived from (proencephalon - mesencephalon - or rhombencephalon) - Thalamus






5. What area of the brain is responsible for emotion - feeding - mating - attention - and memory?






6. Are the following responses associated with histamines H1 or H2 receptor activation? - Bronchial smooth muscle activity






7. 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






8. What component of the ANS is responsible for movement of semen from the epididymis to the ejaculatory ducts?






9. IgE- mediated mast cell release - C3a and C5a - and IL-1 all trigger the release of what vasoactive amine?






10. The DSM- IV- TR is scored on the basis of five axes of diagnosis. In What axis would you place x Personality and mental disorders?






11. What is the function of the basal ganglia?






12. What is the most common one? - Intraspinal tumor






13. What part of the ANS (i.e. - PNS or CNS) controls the constriction of the pupil in response to light?






14. 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?






15. What artery travels with the following veins? - Middle cardiac vein






16. Name the primary vesicle the following structures are derived from (proencephalon - mesencephalon - or rhombencephalon) - Metencephalon






17. If a patient cannot pay - can you refuse services?

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18. Where on the codon and anticodon does the wobble hypothesis take place?

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19. How many acetyl CoAs per glucose enter into the TCA cycle?






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






21. What is the term for a large VSD that leads to pulmonary HTN - RVH - and cyanosis due to right - to - left reversal of the shunt?






22. Name the primary vesicle the following structures are derived from (proencephalon - mesencephalon - or rhombencephalon) - Medulla






23. What myopathy due to autoantibodies to ACh receptors can present with thymic abnormalities - red cell aplasia - and muscle weakness?






24. What are the two actions of calcitonin?






25. From What aortic arch are the following structures derived?






26. What disease involves a lack of both T cell - mediated and humoral immune responses that can be either X- linked or AR?






27. What are the following changes seen in the luminal fluid by the time it leaves the PCT of the nephron? - Percentage of Na+ - Cl - - K+ left in the lumen






28. Which medication requires an acidic gastric pH for activation to form a protective gel - like coating over ulcers and GI epithelium?






29. Objective tests that base the result of the examination on a preset standard use what form of reference?






30. What are the two precursors of heme?






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






32. What embryonic structure forms the adult female structures? - Ovarian and round ligaments






33. What three complement fragments are also anaphylatoxins?






34. What is the only Plasmodium that is quartan?






35. What is the function of the cerebellum?






36. What is the term for neurologic signs consistent with a cerebrovascular accident but lasting 24 hours with full recovery?






37. What protein allows Mycoplasma to attach to the respiratory epithelium?






38. Codman triangle on radiograph






39. What seven structures are found in more than one mediastinum?






40. What happens to capillary oncotic pressure with dehydration?






41. What germ cell tumor is seen in the 15- to 35-year - old age group - peaks when the person is 35 years of age - and is a bulky mass that spreads via the lymphatic system?






42. Are excitatory neurotransmitters in the CNS.






43. What would be the result if an Ab were cleaved with papain?






44. Which two negative sense RNA viruses have neuraminidase enzymes?






45. What cells of the epidermis carry the pigment melanin?






46. What is the most common one? - Type of melanoma






47. What CNS tumor cells stain positive for glial fibrillary acidic protein (GFAP)?






48. Hereditary angioneurotic edema (AD) produces local edema in organs (e.g. - GI - skin - respiratory tract). What enzyme deficiency causes increased capillary permeability due to a release of vasoactive peptides?






49. What disorder of bone remodeling results in thick - weak bones and is associated with high - output cardiac failure?






50. Which hepatitis B serology markers