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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. Is used to detect Abs in a patient?






2. Could an overdose with either zolpidem or zaleplon be reversed with flumazenil?






3. Name the associated chromosome - Neurofibromatosis type 2






4. What muscle keeps the stapes taut against the oval window?






5. What is the term for failure of the testes to descend into the scrotum?






6. What statistical method do you use when analyzing x Case control studies?






7. What component of the ETC is inhibited by the following? - Atractyloside






8. What is the term to describe basophils that have left the bloodstream and entered a tissue?






9. What is the name of the benzodiazepine antagonist used in the treatment of an overdose?






10. What enzyme is deficient in alkaptonuria?






11. There are no persistent infections with...






12. Name the most common type or cause - Childhood heart disease in the United States






13. What syndrome is due to anti - GBM Abs directed against the lung and kidneys?






14. How many strains of Pneumococcus capsular polysaccharides are present in the vaccine?






15. What do the following values indicate? - ED50






16. What protein prevents ssDNA from reannealing during DNA replication?






17. In what form is excess folate stored in the body?






18. Name the product or products of arachidonic acid: x Chemotactic for neutrophils






19. Does light or darkness regulate the pineal gland?






20. What artery travels with the following veins? - Small cardiac vein






21. What is the major stimulus for cell division in chondroblasts?






22. What primary acid - base disturbance is cause by a decrease in alveolar ventilation (increasing CO2 levels) resulting in the reaction shifting to the right and increasing H+ and HCO3- levels?






23. What CN is associated with the sensory innervation of x Laryngopharynx?






24. What wave is the cause of the following venous pulse deflections? - The rise in right atrial pressure secondary to blood filling and terminating when the tricuspid valves opens






25. Do the following structures pick up stain from hematoxylin or eosin? - Fibrin






26. What is the most stressful event as determined by the Holmes and Rahe scale?






27. What is the most common organ involved in amyloidosis?






28. What two ligaments of the uterus are remnants of the gubernaculum?






29. What abdominal muscle contributes to the anterior layer of the rectus sheath - forms the inguinal ligament - and in men gives rise to the external spermatic fascia of the spermatic cord?






30. Is increased in 21-Beta- hydroxylase deficiency.






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






32. What are the two chains of the TCR that are mainly found on the skin and mucosal surfaces?






33. Name the cancer associated with the following tumor markers. (Some may have more than one answer.) x CEA






34. 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?






35. What drug is an M1- specific antispasmodic?






36. What term is described as the prestretch on the ventricular muscle at the end of diastole?






37. What part of the heart forms x Apex?






38. What part of the heart forms x Diaphragmatic wall?






39. How does sympathetic stimulation to the skin result in decreased blood flow and decreased blood volume? (Hint: what vessels are stimulated - and how?)






40. Name the most common type or cause - Erysipelas






41. What two forces affect movement of ions across a membrane?






42. What three muscles constitute the pes anserinus?






43. Name the associated chromosomal translocation - Ewing sarcoma






44. If inserting a needle to perform a pleural tap or insertion of a chest tube - do you use the inferior or the superior border of a rib as your landmark? Why?






45. The proportion of truly diseased persons in the screened population who are identified as diseased refers to?






46. What is the only class of diuretics to retain Cl - used in the short - term treatment of glaucoma and of acute mountain sickness?






47. What is the major difference between the veins in the face and the veins in the rest of the body?






48. What component of the trigeminal nuclei x Forms the sensory component of the jaw jerk reflex?






49. What disorder is associated with spider angiomas - palmar erythema - gynecomastia - testicular atrophy - encephalopathy - abnormalities in clotting factors - and portal HTN?






50. What tract carries the ipsilateral dorsal column fibers from the lower limbs in the spinal cord?







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