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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. Name the compartment of the mediastinum associated with the following thoracic structures: Vagus nerve






2. What thyroid enzyme is needed for oxidation of I- to I'?






3. Is there a difference between mathematical and clinical steady states? If so - What are their values (half - lives)?






4. What organelles make ATP - have their own dsDNA - and can synthesize protein?






5. Is it acceptable to lie - even if it protects a colleague from malpractice?






6. What type of random controlled test is least subjective to bias?






7. What phosphodiesterase inhibitor is used IV in the management of status asthmaticus ?






8. Is T3 or T4 responsible for the negative feedback loop on to the hypothalamus and anterior pituitary gland?






9. Name the type of graft described by these transplants: x From one site to another on the same person






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






11. What is the term for the copper corneal deposits found in Wilson's disease?






12. What paraphilia is defined as x Deriving sexual pleasure from other peoples' pain?






13. In which form of emphysema - panacinar or centriacinar - is the effect worse in the apical segments of the upper lobes?






14. Why are patients with Chronic Granulomatous Disease not prone to develop infections from catalase - negative bacteria?






15. Name the antidote - Arsenic






16. What muscle acts in all ranges of motion of the arm?






17. What is the name for failed recanalization of the duodenum resulting in polyhydramnios - bile - containing vomitus - and a distended stomach?






18. What is the term to describe the inability to feel any pleasant emotions?






19. What DNA viral disease is associated with aplastic crisis in patients with sickle cell anemia?






20. Name the macrophage based on its location: x Connective tissue macrophages






21. What Ig is associated with ADCC for parasites?






22. Name the phase of the eukaryotic cell cycle: x Cells cease replicating (i.e. - nerve cell)






23. What triggers phase 4 of the action potential in a ventricular pacemaker cell?






24. Which trematode is associated with bladder carcinoma in Egypt and Africa?






25. What is the only vein in the body with a high O2 content?






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






27. Which anticonvulsant can cause teratogenic craniofacial abnormalities and spina bifida?






28. What are the three causes of normochromic normocytic anemia with a normal MCV and a low reticulocyte count?






29. How many pairs of spinal nerves are associated with x Sacral vertebrae?






30. What is the term for pigmented iris hamartomas seen in patients with neurofibromatosis type 1?






31. Which organism causes trench fever?






32. What endotoxin receptor is the best marker for macrophages?






33. What is the most common one? - Viral cause of myocarditis






34. What breast malignancy has tumor cells with a halo surrounding the nucleus and is an ulceration of the nipple and areola with crusting - fissuring - and oozing?






35. What area of the small intestine is characterized by Peyer's patches?






36. What benign bone tumor is associated with Gardner syndrome?






37. Has no underlying pathology.

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38. What complement factor deficiency leads to x Hereditary angioedema?






39. Leading to gallstones and steatorrhea.






40. A migrating myoelectric complex is a propulsive movement of undigested material of undigested material from the stomach to the small intestine to the colon. During a fast - What is the time interval of its repeats?






41. What is the major hormone produced in the following areas of the adrenal cortex? - Zona reticularis






42. What syndrome occurs when pelvic inflammatory disease ascends to surround the liver capsule in violin string adhesions?






43. What three cephalosporins can produce disulfiram - like reactions?






44. What type of potential is characterized as being an all - or - none response - propagated and not summated?






45. What type of membrane is characterized as being permeable to water only?






46. What classical conditioning therapy or modification is described as x Pairing noxious stimuli to an inappropriate behavior?






47. Which leukotriene is chemotactic for neutrophils?






48. Have no GI tract They absorb nutrients from the host's GI tract.






49. What is the term for hyphae with constrictions at each septum that are commonly seen in Candida albicans?






50. What is the greatest component of lung recoil?