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






2. Name the stages of sleep with these EEG patterns: x Delta waves






3. What is the site of action of cholera toxin?






4. What is the name for the following RBC indices? - The coefficient of variation of the RBC volume






5. What is the term for new made - up words?

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6. What is the term for formation of a stable fibrin - platelet plug to stop bleeding?






7. What operant conditioning therapy or modification is described as x Reinforcing successive attempts that lead to the desired goal (gradual improvement)?






8. What pituitary hormone is inhibited during sleep?






9. What nerve is associated with the following functions? - Supinate the wrist - extend the wrist and digits - extend the shoulder and elbow






10. What are the most common causes of osteomyelitis x In neonates?






11. Heinz bodies






12. Ophthalmic artery is a branch of What artery?






13. What are the two precursors of heme?






14. Name the thalamic nucleus based on its input and output - Input from the mammillary bodies via the mammillothalamic tract and the cingulated gyrus; output to the cingulated gyrus via the anterior limb of the internal capsule






15. What glycoprotein allows platelets to adhere to each other through the use of fibrinogen?






16. What adrenal enzyme deficiency results in hypertension - hypernatremia - and virilization?






17. What is the name of the process that ensures that each B cell produces only one heavy- chain variable domain and one light chain?






18. What hormone is necessary for normal GH secretion?






19. What is associated with prolonged lithium use?






20. Name the most common one - Chromosomal disorder






21. What disorder is characterized by autoantibodies to IF?






22. What are the following changes seen in the luminal fluid by the time it leaves the PCT of the nephron? - Percentage of Na+ - Cl - - K+ left in the lumen






23. What are the three platelet aggregating factors?






24. What substrate is built up in Niemann - Pick disease?






25. Is an anti - HAV IgG Ab associated with immunization or recent infection?






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






27. Name the cerebral vessel associated with the following vascular pathologies - Subdural hemorrhage






28. What area of the lymph node contains germinal centers?






29. Without ADH the collecting duct would be...






30. What is the fastest - conducting fiber of the heart? Slowest conduction fiber in the heart?






31. What AD GI neoplasia produces multiple adenomatous polyps - osteomas - fibromas - and epidural inclusion cysts?






32. Which centrally acting a2- adrenergic agonist is used in the treatment protocol of opioid withdrawal?






33. Name these immature defense mechanisms: x Returning to an earlier stage of development (e.g. - enuresis)






34. What two AAs have a pKa of 4?






35. On a graphical representation of filtration - reabsorption - and excretion - When does glucose first appear in the urine?






36. What is the term for the difference between systolic and diastolic pressures?






37. What is the treatment for nephrogenic diabetes insipidus induced by lithium?






38. What is the name of the major chemotactic agent released from x Neutrophils?






39. What illicit drug can cause amyloidosis and focal segmental glomerulosclerosis in the kidney?






40. What is the drug of choice for steroid - induced osteoporosis?






41. What disorder is described as having x Conscious symptoms with conscious motivation?






42. How many days prior to ovulation does LH surge occur in the menstrual cycle?






43. What AA is the major carrier of nitrogen byproducts from most tissues in the body?






44. What is the most common one? - Location of a gastric ulcer






45. Match the pulmonary end capillary blood levels.






46. What is the largest muscle in the body?






47. What are the adult remnants of the following structures? - Right and left umbilical arteries






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






49. 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 - decrease; body - increase






50. Where is the most frequent site of ectopic pregnancy?







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