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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 neuropsychologic test has five basic scales testing for the presence and localization of brain dysfunction?






2. Name these cluster A personality disorders: x Socially withdrawn - seen as eccentric but happy to be alone






3. Name the end product or products: x Fatty acid synthesis






4. What type of scheduled reinforcement states that after a desired response - the reinforcement is given x Varying in the number of responses?






5. Name the primary vesicle the following structures are derived from (proencephalon - mesencephalon - or rhombencephalon) - Thalamus






6. Which hepatitis B serology markers






7. Starry sky appearance of macrophages is pathognomonic of what lymphoma?






8. What part of the inner ear contains the gravity receptors for changes in the position of the head?






9. What neuroleptic agent causes retinal deposits - hypotension - and torsades de pointes?






10. What skin condition is a localized proliferation of melanocytes presenting as small - oval - light brown macules?






11. What enzyme deficiency results in darkening of the urine when exposed to air?






12. What paraphilia is defined as x Deriving sexual pleasure from being abused or in pain?






13. Is there more circulating T3 or T4 in plasma?






14. What percent of unwed mothers are teenagers?






15. What enzyme does HIV use to integrate the proviral dsDNA into the host?






16. What cell of the male reproductive system produces testosterone?






17. Name the type of hypersensitivity reaction based on the following properties - Reaction - mediated by sensitized T- cells






18. What are the three signs of morphine overdose?






19. Name the hepatitis virus based on the following information - Enveloped DNA hepadnavirus






20. What diseases are associated with the HLA- DR3 allele

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21. Name the MCC of death - In neonates






22. What type of drug elimination is characterized by the following? - Elimination independent of plasma concentration; constant amount eliminated per unit time; no fixed half - life






23. What segment of the nephron has the highest concentration of inulin? Lowest concentration of inulin?

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24. What IL down - regulates cell mediated immunity?






25. What toxin ADP- ribosylates via Gs protein to increase cAMP?






26. What fructose metabolism enzyme is deficient in patients with vomiting - apathy - diarrhea - jaundice - proximal renal tubular acidosis - hypoglycemia - and hyperuricemia?






27. What molecule that is needed to trigger T cell activation is noncovalently linked to TCR?






28. How many pairs of spinal nerves are associated with x Thoracic vertebrae?






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






30. What AA is a precursor of the following substances? - GABA






31. Name the most common type or cause - Rectal bleeding






32. What cytokine do CD4 T cells secrete to activate B cells when the specific peptide in the groove of the MHC II molecule interacts with the TCR?






33. Which anticonvulsant causes gingival hyperplasia?






34. What portion of the pericardium adheres to the tunica adventitia of the great vessels?






35. In the window phase of a hepatitis B infection - which Abs do you see?






36. What component of the inner ear x Contains endolymph and gravity receptors monitoring linear acceleration and deceleration of the head - noting changes in head position?






37. What is the most common one? - Cancer of the vulva






38. What T cell deficiency syndrome is associated with facial anomalies - hypoparathyroidism - thymic hypoplasia - and recurrent viral and fungal infections?






39. What hormone - stimulated by epinephrine - results in an increase in lipolysis?






40. What three actions should take place when one person threatens the life of another? (Hint: think of the Tarasoff decision.)






41. What small - to medium - sized vasculitis is seen in a 35-year - old man who is a heavy smoker presenting with claudication symptoms in the upper and lower extremities?






42. What is the rate - limiting step in the production of steroids?






43. Leukopenia - neutropenia - and mental deterioration are signs of what mineral deficiency?






44. What stage of male development is characterized by the following LH and testosterone levels? - Both LH and testosterone levels drop and remain low.






45. Abs to what hepatitis B Ag provide immunity?






46. What is the most common one? - Pituitary tumor






47. What Ig activates the complement cascade most efficiently?






48. What is the term for the ability of a test to measure something consistently?

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49. What enzyme is needed to activate the following reactions? - Procarboxypeptidase to carboxypeptidase






50. What area of the brain serves as the major sensory relay center for visual - auditory - gustatory - and tactile information destined for the cerebral cortex - cerebellum - or basal ganglia?







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