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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 operant conditioning therapy or modification is described as x Stopping the reinforcement that is leading to an undesired behavior?






2. Name the phase of the ventricular muscle action potential based on the following information: x Slow channels open - allowing calcium influx; voltage - gated potassium channels closed; potassium efflux through ungated channels; plateau stage






3. With an increase in arterial systolic pressure - what happens to x Heart rate?






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






5. What type of hypersensitivity is an Ab - mediated response against our own cells - receptors - or membranes via IgG or IgM?






6. What are the three stimuli that result in the reninangiotensin - aldosterone secretion?






7. What is the most common one? - Lymph node affected in non - Hodgkin lymphoma






8. What bone disorder is characterized by brown tumors - bone pain - deformities - and fractures due to excessive PTH?






9. What negative sense RNA virus is associated with cough - coryza - and conjunctivitis with photophobia?






10. What mineral deficiency involves blood vessel fragility?






11. Which direct - acting vasodilator is associated with SLE- like syndrome in slow acetylators?






12. RBCs anaerobically use glucose in both the __________ states.






13. What artificial sweetener must patients with PKU avoid?






14. The first sensory neuron is in the dorsal root ganglia. It carries ascending sensory information in the dorsal root of a spinal nerve - eventually synapsing with second sensory neuron. In the brainstem (DCML) and the spinal cord (spinothalamic) the s






15. What type of cell is surrounded by mineralized bone?






16. What is the MCC of death in the United States?






17. What is the term for the syndrome consisting of hepatomegaly - ascites - and abdominal pain due to hepatic vein thrombosis?






18. What endogenous pigment found in the substantia nigra and melanocytes is formed by the oxidation of tyrosine to dihydroxyphenylalanine?






19. What is the most common one? - Pituitary adenoma






20. Panic attacks can be induced by __________ or carbon dioxide.






21. Which anticonvulsant used in the treatment of bipolar disorder is refractory to lithium?






22. Induces the cytochrome P-450 enzymes.






23. What is the function of the arachnoid granulations?






24. What embryonic structure forms the adult male structure? - Gubernaculum testes






25. Which cestode in raw or rare beef containing cysticerci results in intestinal tapeworms?






26. The surge of what hormone induces ovulation?






27. Name the insulin preparation based on the peak effect and duration of action - Peak - 0.5 to 3 hours; duration - 5 to 7 hours






28. A Japanese man has weight loss - anorexia - early satiety - epigastric abdominal pain - and a palpable left supraclavicular lymph node. On endoscopy you find a large - irregular ulcer with elevated margins on the lesser curvature of the stomach. What






29. What CN is associated with the x Third pharyngeal arch?






30. What is the term for hypoperfusion of an area involving only the inner layers?






31. What segments of the lumbosacral plexus form the following nerves? - Tibial nerve






32. The increased oxygen consumption after phagocytosis is for...






33. What adult structures are derived from preotic somites?






34. What is the label given to an individual whose IQ is x Below 69






35. Does light or darkness regulate the pineal gland?






36. What is the term for pupils that react normally to accommodation but have bilateral loss of constriction in response to light?






37. Name the compartment of the mediastinum associated with the following thoracic structures: Left subclavian artery






38. Is a cause of asthma.






39. What medication is used to help alcoholics avoid relapse by decreasing glutamate receptor activity?






40. What organism is associated with the following types of diarrhea? Day care - associated diarrhea in infants






41. Name the compartment of the mediastinum associated with the following thoracic structures: Brachiocephalic vein






42. The DSM- IV- TR is scored on the basis of five axes of diagnosis. In What axis would you place x Clinical disorders (e.g. - schizophrenia)?






43. What bronchogenic carcinoma is associated with an elevated level of Ca2+ - involves keratin pearls - occurs in men more than women - is associated with smoking - occurs in the major bronchi - and is seen in the central areas of the lung?






44. What is the only neuroglial cell of mesodermal origin?






45. What CNS tumor cells stain positive for glial fibrillary acidic protein (GFAP)?






46. What is a plasma cell's life expectancy?






47. What pancreatic islet cell tumor is associated with MEN I syndrome?






48. How can you differentiate between a medial temporal lobe and a hippocampal lesion based on memory impairment?






49. Acts as the vertebral body of C1 allowing lateral rotation of the head. The first cervical vertebra has no vertebral body.






50. Where on the codon and anticodon does the wobble hypothesis take place?

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