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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. All AAs have titration plateaus At what pH values?






2. What area of the lymph node is considered the thymic - dependent area?






3. Has no underlying pathology.

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4. What are the four DNA oncogenic viruses?






5. What sided muscle weakness is seen in an UMN corticospinal tract injury above the pyramidal decussation?






6. What is the most common one? - Tumor in men aged 15 to 35






7. Which IV agent has the lowest incidence of postoperative emesis and has the fastest rate of recovery?






8. What is the most common lysosomal storage disorder?






9. What is the renal compensation mechanism for acidosis?






10. What mushroom poisoning is associated with fulminant hepatitis with extensive liver necrosis?






11. Which medication used in the treatment of bipolar disorder decreases the release of T 4 from the thyroid gland?






12. What receptors are the best markers for NK cells?






13. A migrating myoelectric complex is a propulsive movement of undigested material of undigested material from the stomach to the small intestine to the colon. During a fast - What is the time interval of its repeats?






14. What hormone has the following effects: chondrogenic in the epiphyseal end plates of bones; increases AA transport for protein synthesis; increases hydroxyproline (collagen); and increases chondroitin sulfate synthesis?






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






16. What type of fiber or fibers are carried in (answer motor - sensory - or both) x Ventral rami?






17. Describe the loss for each of the following in a hemisection of the spinal cord. (Brown - S






18. When referring to a series circuit - what happens to resistance when a resistor is added?






19. What disorder of aldosterone secretion is characterized by x Increased total body sodium - ECF volume - plasma volume - BP - and pH; decreased potassium - renin and AT II activity; no edema?






20. What are the two exceptions to the rule 'all cocci are gram positive'?






21. What branch off the vertebral artery supplies x The ventrolateral two - thirds of the cervical spinal cord and the ventrolateral part of the medulla?






22. What disorder is due to a deficiency in tyrosinase?






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






24. When a patient closes the eyes while standing with feet together - the visual and cerebellar components of proprioception are removed - so you are testing the dorsal columns. Swaying with eyes closed is a positive Romberg's sign indicating a lesion i






25. What is the first human disease successfully treated with gene therapy?






26. Name the associated chromosomal translocation - Follicular lymphoma






27. 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?






28. Is DM a contraindication to use of a Beta- blocker in a patient who is having an MI?






29. What commonly encountered overdose produces headache - tinnitus - respiratory alkalosis - metabolic acidosis - confusion - vomiting - and tachypnea?






30. What glycogen storage disease is due to the following enzyme deficiencies? - Muscle phosphorylase

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31. What IL down - regulates cell mediated immunity?






32. What topoisomerase makes ssDNA cuts - requires no ATP - relaxes supercoils - and acts as the swivel in front of the replication fork?






33. What Beta2- agonist is used as a prophylactic agent in the treatment of asthma?






34. Because of their vasodilation action - these cause migraines.






35. Name the antimicrobial agent whose major side effect is listed - Grey baby syndrome






36. What is the only way to increase O2 delivery in the coronary circulation?






37. Name the most common type or cause - Cirrhosis in the United States






38. What type of fiber or fibers are carried in (answer motor - sensory - or both) x Spinal nerve?






39. What are the two most common AAs found in histones?






40. What is the difference between a Ghon focus and a Ghon complex?






41. Name the area of the cerebral cortex affected by the description of the effects - symptoms - and results of the lesion - Apathy - poor grooming - poor ability to think abstractly - decreased drive - poor attention span (Hint: if the lesion is in the






42. What embryonic structure forms the adult male structure? - Ventral part of the penis






43. An 80-year - old woman presents to you with right - sided temporal headache - facial pain and blurred vision on the affected side - and an elevated ESR. Your diagnosis?






44. What drug that penetrates the blood - brain barrier is found in asthma preparations and used as a nasal decongestant?






45. What three structures increase the surface area of the GI tract?






46. What syndrome is characterized by dynein arm abnormality resulting in chronic sinusitis - recurrent pulmonary infections - and infertility?

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47. What condition is defined by both testicular and ovarian tissues in one individual?






48. What statistical test compares the means of groups generated by two nominal variables by using an interval variable?






49. Where in the spinal cord are the presynaptic opioid receptors?






50. Name the RNA subtype based on the following: x Found only in the nucleus of eukaryotes and functions to remove introns from mRNA