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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. In regard to motor development during infancy - choose the motor response that happens first - Release or grasp






2. What nerve supplies general sensation to the anterior two - thirds of the tongue?






3. What type of hypersensitivity is a T cell - mediated response to Ags that are not activated by Ab or complement?






4. What generate anterograde transport of information in a neuron?






5. What personality disorder affects 75% of the prison population?






6. What part of the heart forms x Apex?






7. Name the RNA subtype based on the following: x RNA molecules with enzymatic activity






8. What are known as jumping genes?






9. What negative sense RNA virus is associated with parotitis - pancreatitis - and orchitis?






10. What type of metal poisoning causes mental retardation - somnolence - convulsions - and encephalopathy?






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






12. What antiviral agent is used in the treatment of drug - induced Parkinson's disease?






13. Name the antidote - Warfarin






14. What encephalopathy causes ocular palsies - confusion - and gait abnormalities related to a lesion in the mammillary bodies and/or the dorsomedial nuclei of the thalamus?

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15. What condition results from a deficiency in the enzyme hexosaminidase A?






16. Where is most of the airway resistance in the respiratory system?






17. What hormone's release is strongly associated with stage 4 sleep?






18. What reflex enables the eyes to remain focused on a target while the head is turning?






19. What reflex increases TPR in an attempt to maintain BP during a hemorrhage?






20. Which tetracycline is used to treat prostatitis because it concentrates strongly in prostatic fluid?






21. What is the term for days 1 to 7 of the female cycle?






22. Name the compartment of the mediastinum associated with the following thoracic structures: SVC






23. 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






24. What rate removes any difference between two populations - based on a variable - to makes groups equal?






25. Name the compartment of the mediastinum associated with the following thoracic structures: Aortic arch






26. What disease is described by bilateral flaccid weakness of the upper limbs (LMN) and bilateral spastic weakness of the lower limbs (UMN) beginning at the cervical level of the spinal cord and progressing up or down the cord?

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27. Name the thalamic nucleus based on its input and output - Input from the mammillary bodies via the mammillothalamic tract and the cingulated gyrus; output to the cingulated gyrus via the anterior limb of the internal capsule






28. What nematode is known as hookworms? What is the treatment?






29. Name the insulin preparation based on the peak effect and duration of action - Peak - 0.3 to 2 hours; duration - 3 to 4 hours






30. Name the type of hypersensitivity reaction based on the following properties - Circulating Ab - Ag immune complexes deposited in the tissue result in neutrophil attraction and the release of lysosomal enzymes.






31. What type of membrane channel opens in response to depolarization?






32. What peripheral chemoreceptor receives the most blood per gram of weight in the body?






33. What stage of male development is characterized by the following LH and testosterone levels? - Decreased testosterone production is accompanied by an increase in LH production.






34. Will a patient with a unilateral lesion in the cerebellum fall toward or away from the affected side?






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






36. What hormone is necessary for normal GH secretion?






37. What bones make up the acetabulum?






38. Which muscarinic receptor uses a decrease in adenyl cyclase as its second messenger?






39. There is no hormonal control to the...






40. Name the product or products of arachidonic acid: x Chemotactic for neutrophils






41. What disorder is due to a deficiency in the enzyme phenylalanine hydroxylase?






42. What is the amount in liters and percent body weight for the following compartments? - Interstitial fluid






43. After fertilization - what cells of the corpus luteum x Secrete estrogen?






44. What is the name of the major chemotactic agent released from x The blood serum? (Hint: it is a complement factor.)






45. What area of the hypothalamus is responsible for recognizing an increase in body temperature and mediates the response to dissipate heat?






46. What drug causes a sixfold increase in schizophrenia - can impair motor activity - and can cause lung problems?






47. Name the associated chromosomal translocation - CML






48. What part of the heart forms x Left border?






49. At what stage of cognitive development (according to Piaget) do children x Have abstract thinking?






50. What presynaptic receptor does NE use to terminate further neurotransmitter release?