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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. Cannot be diagnosed until puberty.






2. What is the central chemoreceptor's main drive for ventilation?






3. Where do sperm go for maturation?






4. What is the term for an immunogenic agent that is too small to elicit an immune response?






5. What form of angina is characterized by x Coronary artery luminal narrowing - symptom occurrence during exertion - ST segment depression on ECG?






6. What AR disorder is seen by age 1 to 2 with recurrent sinopulmonary infections - uncoordinated muscle movements - and dilation of the blood vessels?






7. Is splenomegaly more commonly associated with intravascular or extravascular hemolysis?






8. What is the pentad of TTP?

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9. What intrauterine deficiency leads to failure to thrive - mental retardation - motor incoordination - and stunted growth?






10. What is the term for the strength of the association between Ag and an Ab?






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






12. What vascular tumor associated with von Hippel - Lindau syndrome involves the cerebellum - brainstem - spinal cord - and retina?






13. What branches of CN X are the sensory and motor components of the cough reflex? Be specific.






14. What is the only excitatory neuron in the cerebellar cortex - and What is its neurotransmitter?






15. What embryonic structure forms the following adult structures? - Urinary bladder and urethra






16. What is the triad of Felty syndrome?






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






18. Name the three ketone bodies.






19. Name the thalamic nucleus based on its input and output - Input from inferior colliculus; output to primary auditory cortex






20. Name the T- cell CD marker: x Interacts with MHC class I molecules






21. What has occurred to the renal arterioles based on the following changes in the GFR - RPF - FF - and glomerular capillary pressure? - GFR ? - RPF ? - FF normal - capillary pressure ?






22. If a patient with a cerebellar lesion has nystagmus - which way is the fast component directed - toward or away from the lesion?






23. Fluoroquinolones are...






24. What part of the heart forms x Superior border?






25. What cell type do cromolyn and nedocromil affect for prophylactic management of asthma via blockade?






26. Does subatmospheric pressure act to expand or collapse the lung?






27. What tumor marker is associated with seminomas?






28. The probability that a person with a negative test result is truly disease free refers to what value?






29. From What aortic arch are the following structures derived?






30. What is the term for the first 3 to 5 days of the female reproductive cycle?






31. What is found in the R group if the AA is acidic? Basic?






32. What is the vector of African sleeping sickness?






33. 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?






34. What three cells are essential for T- cell differentiation in the thymus?






35. What direction does RNA polymerase move along the template strand of DNA during transcription?

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36. What are the two functions of the thymus in T- cell differentiation?






37. What complex of the ETC contains Cu2+?






38. Which gram - positive bacteria infection of infancy is associated with ingestion of honey?






39. What three substances stimulate parietal cells?






40. What is the most common one? - Site of ischemia in the GI tract






41. Orphan Annie cells






42. What is the most common one? - Site of ulcerative colitis






43. What embryonic structure forms the adult female structures? - Labia majora






44. Which dimorphic fungus is found as hyphae with nondescript conidia in rotting wood in the Upper Great Lakes - Ohio - Mississippi - eastern seaboard of the United States - and southern Canada?






45. Which protozoal parasitic vaginal infection produces a positive whiff test with KOH staining?






46. What ribosomal subunit sizes do eukaryotic cells have?






47. What is the DOC for the following protozoal infections? - Trichomoniasis






48. What is the most common one? - Malignant tumor of the esophagus






49. Name the GLUT transporter based on the following: x Found in skeletal muscle and adipose tissues






50. What is the name of hydrophilic pores that allow the direct passage of ions and particles between two adjacent cells?