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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 Having sex with cadavers?






2. All streptococci are...






3. What hormone acts on Granulosa cells?






4. Name the DNA virus: x Partially dsDNA circular; enveloped; virion - associated polymerases; has RNA intermediate; replicates in the nucleus






5. What enzyme of cholesterol synthesis is inhibited by the statins?






6. During What embryonic week does the intraembryonic coelom form?






7. What enzyme has a 5' to 3' synthesis of the Okazaki fragments - 3' exonuclease activity - and 5' exonuclease activity?






8. What component of the trigeminal nuclei x Receives sensory input (all but pain and temperature) from the face - scalp - dura - and the oral and nasal cavities?






9. What is the effect of LH on the production of adrenal androgens?






10. What bacterium found in poorly preserved canned food causes flaccid paralysis?






11. What Brodmann area is associated with x Primary motor cortex?






12. What agent - in combination with a MAOI inhibitor - can cause hypertensive crisis?






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






14. What are the four reasons for hypochromic microcytic anemia with a low MCV?






15. What gram - positive anaerobic rod with branching filaments is a component of the normal flora of the mouth and female genital tract and is responsible for draining abscesses with sulfur granules in the exudates?






16. What Staphylococcus aureus protein inhibits phagocytosis?






17. Patients with ___________ have no Barr bodies.






18. What encapsulated lymphoid organ is characterized by presence of Hassall's corpuscles - and absence of germinal centers and B cells?






19. What vessel does the right gonadal vein drain into?






20. What spinal nerves contribute to the pelvic splanchnic (parasympathetic) nerves that innervate the detrusor muscle of the urinary bladder?






21. What CNs are affected if there is a lesion in x Pontomedullary junction?






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






23. What primary acid - base disturbance is caused by an increase in alveolar ventilation (decreasing CO2 levels) resulting in the reaction shifting to the left and decreasing both H+ and HCO3- levels?






24. What muscle laterally rotates the femur to unlock the knee?






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






26. What aphasia is seen as an inability to comprehend spoken language and speaking in a word salad?






27. What happens to REM - REM latency - and stage 4 sleep during major depression?






28. What is the most common one? - Bone disorder in the United States






29. What disorder of aldosterone secretion is characterized by x Decreased total body sodium - ECF volume - plasma volume - BP - and pH; increased potassium - renin - and AT II activity; no edema?

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30. Name these anxiety defense mechanisms: x Use of explanations to justify unacceptable behaviors.






31. What is the only site in the body that uses M1 receptors?






32. Which type of cerebral herniation is associated with CN III palsy?






33. What judgment states that the decision - by rights of autonomy and privacy - belongs to the patient - but if the patient is incompetent to decide - the medical decision is based on subjective wishes?






34. What is the effect of hypoventilation on cerebral blood flow?






35. How many attacks are needed over how much time before panic disorder is diagnosed?






36. What form of angina is characterized by x Coronary artery nonocclusive thrombus; symptom occurrence with increasing frequency - duration - intensity - and decreasing activity - frequently at rest?






37. What is an elevated - fluid - filled cavity between skin layers up to 0.5 cm?






38. What thalamic relay nucleus do the mammillary bodies project to?






39. What case is known as 'let nature take its course'?






40. What drug is used to differentiate a cholinergic crisis from myasthenia gravis?






41. The duodenal - jejunal flexure is suspended from the posterior abdominal wall by what?






42. What pathophysiologic disorder is characterized by the following changes in cortisol and ACTH? - Cortisol decreased - ACTH increased

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43. What apoprotein is required for the release of chylomicrons from the epithelial cells into the lymphatics?






44. How early can a pregnancy be detected by hCG assays in the blood? In urine?






45. In what form are triglycerides sent to adipose tissue from the liver?






46. What are the three main components of amyloid?






47. In What area of the brain can an excess of dopamine lead to psychotic symptoms?






48. What endocrine abnormality is characterized by the following changes in PTH - Ca2+ - and inorganic phosphate (Pi)? - PTH decreased - Ca2+ increased - Pi increased






49. Name the antimicrobial agent whose major side effect is listed - Auditory toxicity






50. Name the lipoprotein based on the following characteristics - apo E






Can you answer 50 questions in 15 minutes?



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