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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 are the primary neurotransmitters at the following sites? - The hypothalamus






2. What two muscles do you test to see whether CN XI is intact?






3. Name the associated chromosomal translocation - Ewing sarcoma






4. Name the form of spina bifida - An open neural tube lying on the surface of the back






5. What is the term for the pH range where the dissociation of H+ occurs?






6. What structure of the knee is described thus? - Prevents abduction






7. What is the term for an inhibitory interneuron?






8. What aspects of sleep are affected during benzodiazepine use?






9. Is the hydrophobic or hydrophilic end of the phospholipids of the cell membrane facing the aqueous environment?






10. Name the valve abnormality based on the following criteria: x Diastolic murmur - increased right ventricular pressure - left atrial pressure - and atrial to ventricular pressure gradient; decreased left ventricular filling pressure






11. What segments of the lumbosacral plexus form the following nerves? - Common peroneal nerve






12. In a negatively skewed curve is the mean greater than the mode?






13. Name the antidote - Acetaminophen






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






15. What antiviral agent for ganciclovir - resistant infections has limited utility because of its nephrotoxic side effect?






16. Are eukaryotic proteins that inhibit viral replication by being virus specific.






17. Name the type of exudate - given the following examples - Parasitic infection






18. What is the formula to calculate IQ?






19. What are the pharmacologic effects seen sexually with x a1- Blockers?






20. What is the renal compensation mechanism for alkalosis?






21. Name the macrophage based on its location: x Lung macrophages






22. What is the major pulmonary side effect of






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






24. With what virus are Downey type II cells associated?






25. What is backward masking - and is there a positive correlation with schizophrenic patients?






26. Are hydrolysis - oxidation - and reduction phase I or II biotransformations?






27. What pH (acidotic or alkalotic) is needed for pepsinogen to pepsin conversion?






28. What two pathologic conditions occur when the gut does not return to the embryo?






29. What is the term for headaches - inability to concentrate - sleep disturbances; avoidance of associated stimuli; reliving events as dreams or flashbacks following a psychologically stressful event beyond the normal range of expectation?






30. What is the term to describe inability to recall the past and possible assumption of a completely new identity?






31. Name the area of the cerebral cortex with the function described: x Intellectual processing of sensory information - with the left (dominant) processing verbal information - the right processing visual - spatial orientation






32. What hypothalamic hormone is synthesized in the preoptic nucleus?






33. What testicular tumor of infancy is characterized by elevated - fetoprotein levels and Schiller - Duval bodies?






34. The surge of what hormone induces ovulation?






35. What determines the rate of reaction?






36. Name the associated chromosome - Patau syndrome






37. What infection is associated with ring - enhancing lesions seen on computed tomography (CT) of the brain in an HIV- positive individual?






38. Is the following description characteristic of competitive or noncompetitive antagonists: parallel shift to the right on a dose - response curve - complete reversibility with increase of the dose of the agonist drug - and capacity to decrease the pot






39. What water - associated organism is a weakly stained gram - negative rod that requires cysteine and iron for growth?






40. Name the neurotransmitter at the neuromuscular junctions for all of the voluntary muscles in the body.






41. What three vitamin deficiencies are associated with homocystinemia?






42. Do the following structures pick up stain from hematoxylin or eosin? - Calcium






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






44. What abdominal muscle runs horizontally - contributes to the posterior rectus sheath - and contributes to form the conjoint tendon?






45. What part of the heart forms x Posterior wall?






46. How many mature sperm are produced by one type B spermatogonium?






47. What is the term for taking an mRNA molecule and arranging the AA sequence forming a protein?






48. Name the compartment of the mediastinum associated with the following thoracic structures: Pulmonary artery and veins






49. What is the DOC for Beta- blocker - induced bronchospasms?






50. What virus is associated with body cavity large B- cell lymphomas?







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