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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. Which way will the O2 dissociation curve shift with the addition of 2 - 3- bisphosphoglycerate (2 - 3- BPG) to adult hemoglobin (Hgb)?






2. What skin carcinoma is a superficial dermal infiltrate of T lymphocytes seen in males more than 40 years old and presents as scaly red patches or plaques?






3. 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






4. What is the primary end product of pyrimidine synthesis?






5. What is the name of the urinary bladder where the ureters enter and the urethra exits?






6. Which B- cell neoplasm has the following cell surface markers: CD19 - CD20 - CD5 (T- cell marker) - CD23; and are CD10- negative?






7. In regard to motor development during infancy - choose the motor response that happens first - Radial or ulnar progression






8. What embryonic structure forms the adult female structures? - Gartner's duct






9. What is the most common one? - Inflammatory arthritis






10. Use of an outlet for emotions (stuff flows downhill).






11. Which extravascular chemoreceptor detects low NaCl concentrations?






12. In a positively skewed curve the mean is ______ than the mode.






13. What are the three exceptions to the rule of codominant gene expression?






14. What congenital small bowel outpouching is a remnant of the vitelline duct?






15. What is the most common one? - Primary malignant tumor in the liver






16. Name the most common one - Heart defect in Down syndrome






17. What aneurysm of the circle of Willis is associated with polycystic kidney disease?






18. What CN carries preganglionic parasympathetic fibers that innervate the viscera of the neck - thorax - foregut - and midgut?






19. What Beta- blocker is also a membrane stabilizer?






20. What hormone level increases in the first 3 hours of sleep?






21. What liver enzyme - for triglyceride synthesis - converts glycerol to glycerol -3- phosphate?






22. Name the most common type or cause - Liver transplantation in adults






23. What is the PO2 of aortic blood in fetal circulation?






24. How can a deficiency in adenosine deaminase be a bone marrow suppressor?






25. What cestode causes cysticercosis?






26. Which gram - negative diplococcus ferments maltose?






27. What cell type of the epidermis originates from the neural crest?






28. What is the term for the strength of association between multiple Abbinding sites and multiple antigenic determinants?






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






30. What are the three branches of the celiac trunk?






31. In the classical conditioning model - when a behavior is learned - what must occur to break the probability that a response will happen?






32. What blotting technique uses the following for analysis? - RNA






33. During What embryonic week do somites begin to form?






34. At what stage of cognitive development (according to Piaget) do children x Have abstract thinking?






35. What embryonic structure forms the adult female structures? - Glans clitoris - corpus cavernosus - and spongiosum






36. What is the major inorganic component of bone?






37. Name the type of exudate - given the following examples - Sunburn






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






39. What is the physiologically active form of Ca2+?






40. Aschoff bodies






41. Name the most common type or cause - Nephritic syndrome in adults






42. Name the hepatitis virus based on the following information - Small circular RNA virus with defective envelope






43. What B- cell neoplasm is seen in males with massive splenomegaly - produces dry tap on bone marrow aspirations - and stains positive for tartrate - resistant acid phosphatase (TRAP)?






44. With what stage of sleep is enuresis associated?






45. Which two negative sense RNA viruses have neuraminidase enzymes?






46. What is the MCC of the following meningitides? - In neonates to 3 months of age






47. Name the primary vesicle the following structures are derived from (proencephalon - mesencephalon - or rhombencephalon) - Cerebral hemispheres






48. What is the term for the amount of blood in the ventricle after maximal contraction?






49. What condition results in the following CSF results? - Opening pressure 400 mm H2O; WBCs 8500 (90% PMNs); glucose 15; protein 120






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