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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 primary vesicle the following structures are derived from (proencephalon - mesencephalon - or rhombencephalon) - Pons






2. What is the term for the degree to which a test measures what it is intended to measure?






3. What are the three most common sites for left - sided heart embolisms to metastasize?






4. What enzyme of the TCA cycle catalyzes the production of the following: x GTP






5. Which aminoglycoside is used only topically because it is too toxic for systemic use?






6. How many pairs of spinal nerves exit from the spinal cord?






7. What urease - producing gram - negative curved rod is associated with PUD and chronic gastritis?






8. What part of the heart forms x Anterior wall?






9. What is the most common cancer diagnosed in men? In women?






10. What drug is an M1- specific antispasmodic?






11. Which sedative - hypnotic is contraindicated for patients taking warfarin?






12. What area of the small intestine is characterized by Peyer's patches?






13. What happens to diastolic and systolic intervals with an increase in sympathetic activity?






14. Are used in the management of an acute asthmatic attack.






15. What statistical test checks to see whether the groups are different by comparing the means of two groups from a single nominal variable?






16. Name the AD disease associated with chromosome 15 in which the patient has long extremities - lax joints - pigeon chest - and posterior mitral leaflet prolapse and is prone to developing dissecting aortic aneurysm.






17. What enzyme of the purine salvage pathway is deficient in the following? - Lesch - Nyhan syndrome






18. What pneumoconiosis is associated with exposure to the following occupations or materials? - Miners - metal grinders - and sandblasters

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19. What vitamin deficiency produces homocystinuria and methylmalonic aciduria?






20. What is the most common opportunistic infection of the CNS in HIV?






21. What disease is X- linked recessive - is associated with eczema thrombocytopenia and an increased chance of developing recurrent infections - involves a decrease in serum IgM and in the T cell - dependent paracortical areas of the lymph nodes - and m






22. Why is there a minimal change in BP during exercise if there is a large drop in TPR?






23. What GnRH analog is used as a repository form of treatment in prostatic cancer?






24. With an increase in arterial systolic pressure - what happens to x Stroke volume?






25. Name the RNA subtype based on the following: x Found only in the nucleus of eukaryotic cells and are precursors of mRNA






26. What is the name of the B cell - rich area in the lymph node?






27. At the D2A receptor have the capacity to induce pseudoparkinsonism.






28. What is the most common one? - Cardiac anomaly in Turner syndrome






29. Name the most common type or cause - Urethritis in a young - newly sexually active individual






30. What embryonic structure forms the following adult structures? - Median umbilical ligament






31. What branch off the vertebral artery supplies x The ventrolateral two - thirds of the cervical spinal cord and the ventrolateral part of the medulla?






32. What is the only Ig that crosses the placenta?






33. What is the pancreatic action of CCK?






34. What is the term for a substance secreted by a leukocyte in response to a stimulus?






35. What enzyme is inhibited by disulfiram?






36. What four factors shift the Hgb - O2 dissociation curve to the right? What is the consequence of this shift?






37. What two factors result in the apex of the lung being hypoperfused?






38. At What age do children begin to understand the irreversibility of death?






39. Do the following structures pick up stain from hematoxylin or eosin? - Collagen






40. What are the five branches of the median cord of the brachial plexus?






41. What protein causes fibrinolysis?






42. Why will turbulence first appear in the aorta in patients with anemia?






43. What is the start codon - and What does it code for in eukaryotes? Prokaryotes?






44. What are the two opsonizing factors?






45. What cell is under control of FSH and testosterone; secretes inhibin - MIF - and androgen - binding protein; and phagocytizes the excess cytoplasm of the spermatid?






46. Cowdry type A bodies






47. Which class of antiarrhythmics blocks sodium channels?






48. What is the term for the rate measured for a subgroup of a population?






49. Name the cancer associated with the following tumor markers. (Some may have more than one answer.) x Placental alkaline phosphatase






50. From What embryonic structure are the following structures derived? - The sinus venarum - coronary sinus - and the oblique vein of the left atrium