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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 is the term for the day after the LH surge in the female cycle?






2. Which leukotrienes are associated with the late - phase inflammatory response?






3. What is the size of a positive PPD test for the following? (Reactive) x Posttransplantation patient taking immunosuppressive agents






4. What is the term for formation of a stable fibrin - platelet plug to stop bleeding?






5. What IL down - regulates cell mediated immunity?






6. Name the thalamic nucleus based on its input and output - Input from medial lemniscus and the spinocerebellar tracts; output to the primary somatosensory cortex






7. What X- linked recessive disorder that is due to an abnormality in the dystrophin gene - has onset by age 5 with progressive proximal muscle weakness - calf pseudohypertrophy - and elevated CPK levels?

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8. Is the following description characteristic of competitive or noncompetitive antagonists: parallel shift to the right on a dose - response curve - complete reversibility with increase of the dose of the agonist drug - and capacity to decrease the pot






9. What is the term for the sign revealed when a psoriatic scale is removed and pinpoint bleeding occurs?






10. How can a deficiency in adenosine deaminase be a bone marrow suppressor?






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






12. Name the ocular lesion; be specific - A right LGB lesion (in the thalamus)






13. Are more Abs produced in a primary or a secondary immune response?






14. Which leukotriene is chemotactic for neutrophils?






15. What is the vector of African sleeping sickness?






16. What is the most common one? - Neurotransmitter in the brain






17. What spinal nerves contribute to the pelvic splanchnic (parasympathetic) nerves that innervate the detrusor muscle of the urinary bladder?






18. What CN is associated with the x First pharyngeal arch?






19. What operant conditioning therapy or modification is described as x Removing a reinforcement (without the patient knowing) gradually over time to stop a condition?






20. Name the most common type or cause - Nephrotic syndrome in children






21. Name the most common type or cause - Hypothyroidism in the United States






22. What is the drug of choice for steroid - induced osteoporosis?






23. What type of DNA library is made from the mRNA from a tissue expressing a particular gene?






24. What three PGs are potent platelet aggregators?






25. Name the antidote - Organophosphates






26. What is the term for the dementia characterized by decremental or patchy deterioration in cognitive function due to a cerebrovascular accident?






27. What malignant neoplasm of the bone is associated with Homer - Wright pseudorosettes; onion skinning of the periosteum on radiographs of the femur - pelvis - and tibia; and chromosome 11;22 translocation?

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28. What Ig prevents bacterial adherence to mucosal surfaces?






29. What nerve is associated with the following functions? - Innervation of the flexor carpi ulnaris - flexor digiti profundus (pinky and ring fingers) - and the intrinsic muscles of the hand






30. What Ab is an indication of low transmissibility for hepatitis?






31. What complement factor deficiency leads to x Recurrent gonococcal infections?






32. What Freudian psyche component is described as x The conscience - morals - beliefs (middle of the road)?






33. What component of the ANS is responsible for movement of semen from the epididymis to the ejaculatory ducts?






34. What three Beta- blockers are used in the treatment of glaucoma?






35. What liver enzyme - for triglyceride synthesis - converts glycerol to glycerol -3- phosphate?






36. How many codons code for AAs? How many for termination of translation?






37. Name the Plasmodium species based on the following information: Persistent hypnozoite liver stage with relapses; blood smear shows amoeboid trophozoites; 48- hour fever spike pattern; the most prevalent form worldwide






38. What is the major muscle used in the relaxed state of expiration?






39. What is the term for processing an APC's pinocytosed material by fusing with a lysosomal granule and cleaving the Ag into peptide fragments?






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






41. What type of mortality rate is defined as the number of deaths x From a specific cause per number of persons with the disease?






42. Name the period described by the following statement: no matter how strong a stimulus is - no further action potentials can be stimulated.






43. Measles - mumps - varicella zoster - and Francisella tularensis.






44. What muscle of the middle ear is innervated by the mandibular division of CN V?






45. Oxidation of Hgb forms what bodies in patients with G-6- PD deficiency?






46. What muscle or muscles are innervated by the following nerves? - Thoracodorsal nerve






47. Results in vitamin B12 malabsorption.






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






49. What component of the trigeminal nuclei x Supplies the muscles of mastication?






50. What bonds are broken by endonucleases?

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