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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 acid - base disturbance occurs in colonic diarrhea






2. What embryonic structure forms the adult male structure? - Urinary bladder - urethra - prostate gland - bulbourethral gland






3. What breast pathology involves malignant cells with halos invading the epidermis of the skin?






4. Most sleep time is spent In what stage of sleep?






5. What breast malignancy has tumor cells with a halo surrounding the nucleus and is an ulceration of the nipple and areola with crusting - fissuring - and oozing?






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






7. What is the bioactive form of thyroid hormone?






8. What component of the ANS is responsible for dilation of the blood vessels in the erectile tissue of the penis - resulting in an erection?






9. What antiviral agent blocks the attachment and penetration of influenza A virus?






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






11. What is the most common one? - Site for atherosclerotic plaques in the abdominal aorta






12. Are contraindicated in patients who present to the hospital with CHF.






13. Measles - mumps - varicella zoster - and Francisella tularensis.






14. What is the name of the postganglionic parasympathetic ganglion that innervates x The papillary sphincter and ciliary muscle of the eye?






15. What form of GN is characteristically associated with crescent formation?






16. What type of hormone is described as having intracellular receptors - being synthesized as needed - mostly bound to proteins - and having its activity determined by free hormone levels?






17. What lysosomal enzyme is deficient in x Niemann - Pick disease?






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

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19. When do hCG concentrations peak in pregnancy?






20. What neuronal cell bodies are contained in the intermediate zone of the spinal cord? (T1- L2)






21. What is a palpable - elevated solid mass up to 0.5 cm?






22. Name the structure that enters or exits the following foramina: x Optic canal






23. Name the type of regeneration (i.e. - labile - stable - or permanent) based on the following examples - Fibroblasts






24. Regarding the Lac operon - for What do the following genes code? - I gene






25. What disease that involves mental retardation - flat face - muscle hypotonia - and a double - bubble sign on radiograph poses an increased risk of Alzheimer's disease and All?






26. What is the term for production of a DNA copy from an RNA molecule?






27. Curschmann spirals






28. What are the three carboxylase enzymes that require biotin?






29. What does failure of PaO2 to increase with supplemental O2 indicate?






30. When is the first arrested stage of development in the female reproductive cycle?






31. Which bacteria are associated with the following pigment production? - Red pigmentation






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






33. What three organs are necessary for the production of vitamin D3(cholecalciferol)?






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






35. What autoimmune disorder is due to Abs directed to ACh receptors at the NMJ?






36. Name these mature defense mechanisms: x Helping others without expecting any return






37. What DNA excision and repair enzyme is deficient in patients with xeroderma pigmentosum?






38. What triggers phase 4 of the action potential in a ventricular pacemaker cell?






39. With a decrease in arterial diastolic pressure - what happens to x TPR?






40. Name the cancer associated with the following tumor markers. (Some may have more than one answer.) x CA-19.9 and CEA






41. What transports iron in the blood?






42. Name the type of necrosis - Histologically resembles fibrin






43. Name the cancer associated with the following oncogenes. (Some may have more than one answer) x abl






44. What is the most common one? - Type of hernia seen in males more than 50 years old






45. Name the most common type or cause - Acute renal failure in the United States






46. What AA has a pKa of 13?






47. How many pairs of spinal nerves are associated with x Sacral vertebrae?






48. What is the rule of one - third regarding muscle type of the esophagus?






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






50. What is the most common one? - Malignant thyroid tumor