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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 paraphilia is defined as x Combining sex with urination?






2. What signals are used to direct an enzyme to a lysosome?






3. What type of fiber or fibers are carried in (answer motor - sensory - or both) x Spinal nerve?






4. What is the tetrad of tetralogy of Fallot?






5. From what pharyngeal pouch is the following structure derived? - Inferior parathyroid gland and thymus






6. What embryonic structure forms the adult female structures? - Labia majora






7. What three vitamin deficiencies are associated with homocystinemia?






8. Name the most common type or cause - Sinusitis and otitis media in children






9. Describe What type of fluid is either gained or lost with the following changes in body hydration for the ECF volume - ICF volume - and body osmolarity - respectively: x ECF - increase; ICF - increase; body - decrease






10. What is the enzyme for the oxidative reaction in glycolysis?






11. What oral hypoglycemic agent stimulates pancreatic Beta- cell release of insulin and is given just prior to meals because of its short half - life?






12. What mast cell mediator is a chemotactic agent?






13. Can advance directives be oral?






14. Name the cancer associated with the following oncogenes. (Some may have more than one answer) x Ki - ras and erb -2






15. What lymphoid organ has the following characteristics: outer and inner cortical areas - encapsulation - germinal centers - and high endothelial venules?






16. What Freudian psyche component is described as x The conscience - morals - beliefs (middle of the road)?






17. What thyroid enzyme is needed for oxidation of I- to I'?






18. What organ functions to keep blood glucose levels normal through both well - fed and fasting states and produces ketones in response to increased fatty acid oxidation?






19. What organism is associated with the following types of diarrhea? Watery diarrhea from beef - poultry - or gravies






20. What facultative intracellular fungus is associated with hepatosplenomegaly?






21. Name the ocular lesion; be specific - A right LGB lesion (in the thalamus)






22. What is the term for the point on a scale that divides the population into two equal parts?






23. Which direction is air flowing when the intra - alveolar pressure is zero?






24. Name the area of the cerebral cortex with the function described: x Recall of objects - distances - and scenes; visual input processed here






25. What cells of the kidney are extravascular chemoreceptors for decreased Na+ - Cl - - and NaCl?






26. What vascular pathology is associated with HTN in the upper extremities - hypotension in the lower extremities - and a radial - femoral delay?






27. What antitubercular agent requires vitamin B6 supplementation?






28. Name the cancer associated with the following chemical agents. (Some may have more than one answer.) x Naphthylamine






29. What is the most common one? - Form of vasculitis






30. What is the most common STD?






31. What type of bias is it when the sample population is not a true representative of the population?






32. Name the product or products of arachidonic acid: x Pain and fever






33. What does Candida albicans do that distinguishes it from other fungi?






34. Does subatmospheric pressure act to expand or collapse the lung?






35. What is the most common one? - Viral cause of myocarditis






36. Name the three postganglionic sympathetic ganglia that receive input from thoracic splanchnics.

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37. What is the DOC for the treatment of the late phase response in an asthmatic attack?






38. Name the muscle type based on these descriptions: x Continuous involuntary contraction - uninuclear striated branched fibers - actin and myosin overlapping for banding pattern - dyadic T tubules - intercalated discs - troponin and desmin as a Z disc






39. What lipoprotein is formed if an IDL particle acquires cholesterol from a HDL particle?






40. Thin extremities - fat collection on the upper back and abdomen - hypertension - hypokalemic alkalosis - acne - hirsutism - wide purple striae - osteoporosis - hyperlipidemia - hyperglycemia with insulin resistance - and protein depletion are all cha






41. What is the titratable acid form of H+ in the urine?






42. Is excretion greater than or less than filtration for net secretion to occur?






43. A 20-year - old woman who was recently diagnosed with a sexually transmitted disease goes to the ER with a tender - painful - swollen - and erythematous knee (monoarticular). What organism is the likely culprit?






44. Name the MCC - Epiglottitis in an unvaccinated child






45. What form of oxidation takes place with the addition of a water molecule and breakage of bonds?






46. What three AAs are used to synthesize the purine ring?






47. Which of the following characteristics accurately describe fungi - bacteria - viruses - or parasites? - Eukaryotic cell - 15 to 25 microns - 80S ribosomes - no cell walls - replicates via cytokinesis with mitosis and meiosis






48. Does light or darkness regulate the pineal gland?






49. When does most REM sleep occur - in the first or second half of sleep?






50. What branch of the immune system is acquired in response to an Ag?