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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 key issue surrounding teenagers' maturation?






2. What disease is X- linked recessive - is associated with eczema thrombocytopenia and an increased chance of developing recurrent infections - involves a decrease in serum IgM and in the T cell - dependent paracortical areas of the lymph nodes - and m






3. At What age does IQ stabilize?






4. If the pH is low with increased CO2 levels and decreased HCO3- levels - What is the acid - base disturbance?






5. What subtype of schizophrenia is characterized by x Delusions of persecution and/or grandeur - auditory hallucinations - late onset - and the best prognosis?






6. What two AAs do not have more than one codon?






7. Is nystagmus defined by the fast or slow component?






8. RBCs in the urine






9. What vasculitis affects a 30-year - old Asian female having visual field deficits - dizziness - decreased blood pressure - and weakened pulses in the upper extremities?






10. What disorder is characterized by autoantibodies to IF?






11. What is the only dsRNA virus?






12. What is the most common one? - Benign ovarian tumor






13. Name the lung measurement based on the following descriptions: x Additional volume that can be expired after normal expiration






14. Where are the lowest resting PO2 levels in a resting individual?






15. Why is there a decrease in the production in epinephrine when the anterior pituitary gland is removed?






16. With What three enzymes is thiamin pyrophosphate (TPP) associated?






17. When is the surface tension the greatest in the respiratory cycle?






18. Name the cerebral vessel associated with the following vascular pathologies - Epidural hemorrhage






19. What adrenergic receptors use inositol triphosphate (IP3) and diacylglycerol (DAG) for their second messenger system?






20. What is the fluid of the posterior compartment of the eye?






21. What is the term for diffusion of water across a semipermeable or selectively permeable membrane?






22. Which penicillin can cause interstitial nephritis?






23. What are the pharmacologic effects seen sexually with x Neuroleptics?






24. What happens to the intrapleural pressure when the diaphragm relaxes?






25. A 20-year - old woman who was recently diagnosed with a sexually transmitted disease goes to the ER with a tender - painful - swollen - and erythematous knee (monoarticular). What organism is the likely culprit?






26. What are the proteoglycans of cartilage and bone?






27. What is the relationship between chance of error and x Sample size?






28. What enzyme of heme synthesis is deficient in the autosomal dominant disorder acute intermittent porphyria?






29. Based on operant conditioning - What type of reinforcement is described when x Adding a stimulus reinforces a behavior?






30. What area of the limbic system is responsible for attaching emotional significance to a stimulus?






31. What hormone disorder is characterized by the following abnormalities in sex steroids? - LH? - and FSH?? - Sex steroids - LH - FSH ?






32. What enzyme of the TCA cycle catalyzes the production of the following: x NADH (hint: 3 enzymes)






33. Name the antidote - Opioids






34. What is the most common one? - Proliferative abnormality of an internal organ






35. What causes a skeletal muscle contraction to terminate?






36. What is the primary method of nonverbal communication of emotional states?






37. 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?






38. Name the cancer associated with the following oncogenes. (Some may have more than one answer) x sis






39. What two factors cause PTH to be secreted?






40. What Ig is the major protective factor in colostrum?






41. What is the label given to an individual whose IQ is x Below 69






42. What muscle or muscles are innervated by the following nerves? - Upper subscapularis nerve






43. Does ELISA or Western blot confirm whether a patient is HIV- positive?






44. Which of the following characteristics accurately describe fungi - bacteria - viruses - or parasites? - Small prokaryotic cells; no histones; 70S ribosomes; no sterols in cell membrane; peptidoglycans in cell wall; replicate by binary fission






45. What are the five F's associated with gallstones?






46. Under resting conditions - What is the main determinant of cerebral blood flow?






47. What CN is associated with the sensory innervation of x Laryngopharynx?






48. Which dopamine receptor excites the direct pathway of the basal ganglia?






49. What AR CNS disorder presents early in childhood with gait ataxia - loss of deep tendon reflexes - impaired vibratory sensation - hand clumsiness - and loss of position sense?






50. Which hepatitis B serology markers