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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. Birbeck granules






2. Setting up to be let down (it is unconscious; if conscious - you're just rude)






3. What vascular injury may result from a supracondylar fracture of the femur?






4. What AA has a pKa of 13?






5. Regarding skeletal muscle mechanics - What is the relationship between velocity and afterload?






6. Abs to what hepatitis B Ag provide immunity?






7. Where are the postganglionic neuron cell bodies - the CNS or the PNS?






8. Which a - blocking agent is used to treat refractory hypertension and baldness?






9. What neurotransmitter is essential for maintaining a normal BP when an individual is standing?






10. What is used as an index of the number of functioning carriers for a substance in active reabsorption in the kidney?






11. What is the polarity (i.e. - 5'-3' or 3'-5') of a positive sense RNA?

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12. Name the cluster C personality disorder: x Sensitive to criticism - shy - anxious; socially isolated but yearns to be in the crowd






13. What water - soluble - vitamin deficiency is associated with cheilosis and magenta tongue?






14. What subset of CD4 helper T- cell function is helping the development of CD8 T cells?






15. Which cestode infection results in alveolar hydatid cyst disease?






16. In which syndrome does a person present with intentionally produced physical ailments with the intent to assume the sick role?






17. Name the DNA virus: x Partially dsDNA circular; enveloped; virion - associated polymerases; has RNA intermediate; replicates in the nucleus






18. What is the most common one? - Malignancy of the female genital tract






19. What is the term for the load a muscle is trying to move during stimulation?






20. Which of the following characteristics accurately describe fungi - bacteria - viruses - or parasites? - Eukaryotic cell; 3 to 10 microns; 80S ribosomes; chitinous cell wall; ergosterol in cell membrane; replicate via cytokinesis with mitosis and meio






21. Which integrin mediates adhesion by binding to lymphocyte function - associated Ag 1 (LFA-1) and MAC-1 leukocyte receptors?






22. What stromal tumor in males is characterized histologically with crystalloids of Reinke?






23. What drug is given transdermally for chronic pain but can cause chest wall rigidity if given IV?






24. What component of the ANS - when stimulated - results in bronchoconstriction?






25. Which subtype of AML is most commonly associated with Auer rods?






26. What syndrome is associated with the following brainstem lesions? - Contralateral corticospinal and medial lemniscus tract deficits and an ipsilatera medial strabismus secondary to a lesion in CN VI






27. What is the most energy- demanding phase of the cardiac cycle?






28. What is the most common one? - Brain tumor






29. What excitatory fibers arise from the inferior olivary nuclei on the contralateral side of the body?






30. Are the following parameters associated with an obstructive or restrictive lung disorder: decreased FEV1 - FVC - peak flow - and FEV1/FVC; increased TLC - FRC - and RV?






31. A 25-year - old black woman presents with nonproductive cough - shortness of breath - fatigue - and malaise; she has bilateral hilar lymphadenopathy on chest radiography and elevated ACE levels. What do you diagnose?






32. Anatomical and alveolar dead spaces together constitute what space?






33. What enzyme requires molybdenum as a cofactor?






34. What is the MCC of the following endocarditis scenarios? - Post dental work






35. Which of the following characteristics accurately describe fungi - bacteria - viruses - or parasites? - Acellular; some are enveloped; replicate within the host cell; no cell walls






36. What small gram - negative facultative intracellular rod is transmitted to human host by Dermacentor tick bite?






37. What three chemical agents are associated with angiosarcomas of the liver?






38. What statistical test compares the means of many groups (>2) of a single nominal variable by using an interval variable?






39. What three drugs are associated with SLE- like syndrome in slow acetylators?






40. What cell type involves humoral immunity?






41. Name the stages of sleep with these EEG patterns: x Alpha waves






42. What is the term for RNA- dependent DNA polymerase?






43. What three complement fragments are also anaphylatoxins?






44. What tract carries the ipsilateral dorsal column fibers from the lower limbs in the spinal cord?






45. What oral hypoglycemic agent stimulates pancreatic Beta- cell release of insulin and is given just prior to meals because of its short half - life?






46. With a decrease in arterial diastolic pressure - what happens to x Heart rate?






47. What genetic defect is characterized by coarse facial features - gingival hyperplasia - macroglossia - psychomotor and growth retardation - club foot - claw hand - cardiorespiratory failure - and death in the first decade of life?






48. How many ATPs are produced from cytoplasmic NADH oxidation using the malate shuttle?






49. Which of the following






50. How many mature sperm are produced by one type B spermatogonium?







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