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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 are the four chemotactic agents?






2. Under resting conditions - What is the main determinant of cerebral blood flow?






3. What hormone is characterized by the following renal effects? - Calcium reabsorption - phosphate reabsorption






4. Megaloblastic anemia and thrombocytopenia are signs of what vitamin deficiency?






5. What hereditary bone disorder is due to decreased osteoclast function - resulting in thick - sclerotic bones that fracture easily?






6. Are elevated alkaline phosphatase and decreased phosphorus and calcium levels more consistent with osteoporosis or osteomalacia?






7. Name the most common type or cause - Painless hematuria






8. Name the structure that enters or exits the following foramina: x Foramen magnum






9. What type of GN - associated with celiac disease and dermatitis herpetiformis - has mesangial deposits of IgA - C3 - properdin - IgG - and IgM?






10. What type of resistance system - high or low - is formed when resistors are added in a series?






11. What region or regions of the adrenal cortex are stimulated by ACTH?






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






13. What thyroid abnormality has the following? - TRH decreased - TSH decreased - T4 increased






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






15. What ocular muscle x Depresses and adducts the eyeball?






16. How can a genetic deficiency of carbamoyl phosphate synthetase be differentiated from an ornithine transcarbamoylase deficiency?






17. What histone binds two nucleosomes together?






18. Which nicotinic receptor antagonist is inactivated to laudanosine?






19. What neuroendocrine tumor produces excess serotonin; is associated with diarrhea - flushing - bronchospasms - wheezing; and is diagnosed by findings of elevated urinary 5- HIAA levels?






20. Name the antidote - Acetaminophen






21. What are the three posttranscriptional modifications?

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22. What lymphoma is characterized by CD19 - CD20 - CD5; CD23- negative; and chromosome 11;14 translocations?






23. What type of neurofibromatosis is associated with bilateral acoustic schwannomas?






24. Via what cell surface receptor does HDL cholesterol from the periphery enter hepatoceles?






25. With what stage of sleep are night terrors associated?






26. What is the name of the postganglionic parasympathetic ganglion that innervates x The parotid gland?






27. Name these anxiety defense mechanisms: x Separating oneself from the experience. The facts are accepted but the form is changed for protection.






28. What foci of fibrinoid necrosis are surrounded by lymphocytes and macrophages throughout all the layers of the heart?






29. What apoprotein is required for the release of chylomicrons from the epithelial cells into the lymphatics?






30. How many days prior to ovulation does estradiol peak in the menstrual cycle?






31. Name the associated chromosome - Huntington disease






32. What is the most common chromosomal abnormality associated with CLL?






33. Name the following descriptions associated with bacterial endocarditis: x Painful subcutaneous nodules on fingers and toes






34. What foramen must be traversed for entry into the lesser peritoneal sac?






35. What form of bilirubin is carried on albumin?






36. Are resistant to the effects of aminoglycosides.






37. For what disease are SS- A(Ro) - SS- B(La) - and R- ANA diagnostic markers?






38. Who is responsible for passing on mitochondrial DNA genetic disorders?






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






40. What is the most common one? - Benign breast tumor in females less than 35 years old






41. What sex cell tumor causes precocious puberty - masculinization - gynecomastia in adults - and crystalloids of Reinke?






42. What is the size of a positive PPD test for the following? (Reactive) x Patient with AIDS






43. Name the lung measurement based on the following descriptions: x Additional air that can be taken in after normal inspiration






44. In What trimester is the fetus most vulnerable to congenital rubella syndrome?






45. What is the most common one? - Helminthic parasite worldwide






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






47. What is the most likely organism causing cellulitis in a patient who was cut by an oyster shell?






48. What glycoprotein allows platelets to adhere to each other through the use of fibrinogen?






49. Name the compartment of the mediastinum associated with the following thoracic structures: Pulmonary artery and veins






50. What is the term for the amount of a drug that is needed to produce the desired effect?







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