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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. Eating fava beans can produce the Mediterranean type of what deficiency?






2. Name the compartment of the mediastinum associated with the following thoracic structures: Splanchnic nerves






3. What is absorbed in the gallbladder to concentrate bile?






4. What neurotransmitter is essential for maintaining a normal BP when an individual is standing?






5. What is the most common site for an aneurysm in cerebral circulation?






6. Signet ring cells






7. What AD dementia has a defect in chromosome 4 - onset between the ages of 30 and 40 - choreoathetosis - and progressive deterioration to an infantile state?






8. How is the eye affected by use of opioids?






9. What is the most common cause of vitamin B6 deficiency?






10. What Ig mediates ADCC via K cells - opsonizes - and is the Ig of the secondary immune response?






11. What papillae are touch receptors on the tongue and send their sensations via CN V3 (mandibular division)?






12. T3 increases bone ossification through synergistic effect with what hormone?






13. When a person goes from supine to standing - what happens to the following? - Dependent venous pressure






14. What phase of the menstrual cycle is dominated by estrogen? Progesterone?






15. What is the most common cancer diagnosed in men? In women?






16. Initiates rhythmic contractions associated with labor.






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






18. What is the stimulus for the classical pathway activation?






19. What is the term for a venous embolus in the arterial system?






20. What statistical test compares the means of many groups (>2) of a single nominal variable by using an interval variable?






21. What cell type is commonly elevated in asthma?






22. What purine base is contained in inosine monophosphate?






23. What AA is a precursor of the following substances? - N2O






24. What acid - base disturbance is produced from vomiting?






25. Is it acceptable to lie - even if it protects a colleague from malpractice?






26. What disorder is characterized by a depressed mood and a loss of interest or pleasure for more than 2 years?






27. What enzyme - induced by insulin and activated by apo C- II - is required for chylomicron and VLDL metabolism?






28. Why will turbulence first appear in the aorta in patients with anemia?






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






30. In prokaryotes - What is the name of the RNA sequence that ribosomes bind to so translation can occur?






31. What type II hypersensitivity disorder is defined as x Autoantibodies directed against RBC Ag I?






32. What is the term for a large - immature RBC that is spherical - blue - and without a nucleus?






33. What is the site of action of the following? - Osmotic diuretics






34. When a patient closes the eyes while standing with feet together - the visual and cerebellar components of proprioception are removed - so you are testing the dorsal columns. Swaying with eyes closed is a positive Romberg's sign indicating a lesion i






35. Name the period described by the following statement: no matter how strong a stimulus is - no further action potentials can be stimulated.






36. What is the epithelial cell lining the nasopharynx?






37. What is the respiratory compensation mechanism for metabolic alkalosis?






38. Is excretion greater than or less than filtration for net secretion to occur?






39. Males are more likely to develop _______ than females.






40. In what stage of psychosexual development - according to Freud - do children resolve the Oedipus complex?






41. Can committed mentally ill patients refuse medical treatment?






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






43. What vitamin deficiency is evidenced by poor wound healing - loose teeth - bleeding gums - petechiae - and ecchymosis?






44. What is the term to describe a man who has x The ability to have an erection sometimes and other times not?






45. Which hepatitis strain is a defective virus that can replicate only inside HBV- infected cells?






46. What region of the brain houses the central chemoreceptors responsible for control of ventilation?






47. Name the antidote - Anticholinergics






48. All aluminum - containing antacids can cause...






49. Name the ocular lesion; be specific - A right LGB lesion (in the thalamus)






50. What disconnect syndrome results from a lesion in the corpus callosum secondary to an infarct in the anterior cerebral artery - so that the person can comprehend the command but not execute it?

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