Test your basic knowledge |

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 bedside test is used to differentiate a dorsal column lesion from a lesion in the vermis of the cerebral cortex?

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2. What Enterobacteriaceae are prone to produce osteomyelitis in sickle cell patients?






3. How many oogonia are present at birth?






4. If you order a V/Q scan for suspected pulmonary emboli - is the filling defect seen on the ventilation or perfusion side?






5. What type of cell can never leave the lymph node?






6. Where are the LMN cell bodies of the corticospinal tract?






7. What is the term for a single isolated antigenic determinant?






8. When does the primitive gut herniate out of the embryo? When does it go back into the embryo?






9. In what rare lung malignancy have 90% of patients had an occupational exposure to asbestos?






10. What lipoprotein is formed if an IDL particle acquires cholesterol from a HDL particle?






11. What nephrotic syndrome has effacement of the epithelial foot processes without immune complex deposition?






12. Are the following responses associated with histamines H1 or H2 receptor activation? - Pain and pruritus






13. What cestode causes cysticercosis?






14. A depressive patient who is taking paroxetine goes to the ER with pain and is given meperidine. Shortly afterward she develops diaphoresis - myoclonus - muscle rigidity - hyperthermia - and seizures. What is your diagnosis?






15. What is the most common one? - Malignant carcinoma of the ovaries






16. Name these immature defense mechanisms: x Taking others' beliefs - thoughts - and external stimuli and making them part of the self. (Hint: if it's done consciously - it is called imitation.)






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






18. What CN is associated with the x First pharyngeal arch?






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






20. A 20-year - old woman goes to the ER with ptosis - diplopia - weakness in her jaw muscles when chewing - and muscle weakness with repeated use. What is your diagnosis?






21. What stage of male development is characterized by the following LH and testosterone levels? - LH secretion drives testosterone production - with both levels paralleling each other.






22. How is velocity related to the total cross - sectional area of a blood vessel?






23. Which way does the Hgb - O2 dissociation curve shift in patients with CO poisoning?






24. What is the pentad of TTP?

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25. What drug is used to differentiate a cholinergic crisis from myasthenia gravis?






26. Name the most common cause - Insomnia






27. Name the following descriptions associated with bacterial endocarditis: x Retinal emboli






28. What cells of the adrenal gland are neural crest derivatives?






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






30. What antiviral agents inhibit neuraminidases of influenza A and B?






31. T cells can recognize - bind - and internalize...






32. How many days before the first day of menstrual bleeding is ovulation?






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






34. The 'tea - and - toast' diet is classically associated with what cause of megaloblastic anemia?






35. The clearance of what substance is the gold standard of renal plasma flow?






36. By What age should children be able to draw the following figures? - Cross






37. What preganglionic sympathetic fibers are responsible for innervating the smooth muscle and glands of the pelvis and the hindgut?






38. Do the following structures pick up stain from hematoxylin or eosin? - Cytoplasm






39. What test uses p24 protein when diagnosing HIV?






40. What is the costliest health care problem in the United States?






41. What three AAs are used to synthesize the purine ring?






42. What are the three sites where CSF can leave the ventricles and enter the subarachnoid space? (Name the lateral and the medial foramina.)






43. What are the two most common viral infections in HIV?






44. What growth factors are chondrogenic - working on the epiphyseal end plates of bone?






45. What is secretin's pancreatic action?






46. What enzyme is deficient in the following glycogen storage disease? - McArdle's disease






47. What is the most common one? - Primary malignant tumor of the female genital tract in the world






48. What type of Plasmodium affects x Only mature RBCs?






49. Name the B- cell CD marker: x Used clinically to count B cells in blood






50. Name the associated chromosome - Neurofibromatosis type 2