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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. Which chromosome is associated with MHC genes?






2. Name the cancer associated with the following chemical agents. (Some may have more than one answer.) x Arsenic






3. What statistical method do you use when analyzing x Case control studies?






4. What is the most common one? - Site for carcinoid tumors






5. Is a nicotinic receptor agonist.






6. Use of an outlet for emotions (stuff flows downhill).






7. What type of fiber or fibers are carried in (answer motor - sensory - or both) x Dorsal root?






8. What AR disorder is due to a deficiency in glycoprotein IIb - IIIa - resulting in a defect in platelet aggregation?






9. What three major cell lines participate in the acquired immune system?






10. What cells of the retina see in black and white and are used for night vision?






11. Is an excitatory neurotransmitter in the CNS.






12. Which drugs bind to the 30S ribosomal subunit and interfere with the initiation complex - causing a misreading of mRNA?






13. What type of correlation is defined as x Two variables with no linear relation to one another?






14. What is the term for the load a muscle is trying to move during stimulation?






15. What is the term for a direct connection between the intestine and the external environment through the umbilicus because the vitelline duct persists?






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






17. Orphan Annie cells






18. What are the two factors that affect alveolar PCO2 levels?






19. Name the most common type or cause - Sinusitis and otitis media in children






20. From What aortic arch are the following structures derived?






21. What cells contribute to the blood - brain barrier and proliferate in response to CNS injury?






22. Name the type of exudate - given the following examples - Parasitic infection






23. What is needed to initiate translation?






24. RBCs anaerobically use glucose in both the __________ states.






25. What hemoflagellate species is the cause of Chagas disease?






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






27. In a ventricular pacemaker cell - what phase of the action potential is affected by ACh?






28. What immunologic test checks for a reaction between Abs and a particular Ag? (hint: ABO typing)






29. What slow - growing primary CNS tumor that affects mostly females is associated with psammoma bodies?






30. Name the neurotransmitter at the neuromuscular junctions for all of the voluntary muscles in the body.






31. What urinary metabolite is elevated in pheochromocytoma?






32. Which hepatitis B serology markers






33. What HIV enzyme produces a dsDNA provirus?






34. Name the cancer associated with the following oncogenes. (Some may have more than one answer) x erb -1






35. What three substances stimulate glycogenolysis?






36. Name these immature defense mechanisms: x Taking others' beliefs - thoughts - and external stimuli and making them part of the self. (Hint: if it's done consciously - it is called imitation.)






37. Which two tetracyclines have the highest plasma binding?






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






39. What family do the following viruses belong to? - Rabies






40. What happens to capillary oncotic pressure with dehydration?






41. Lack platelets.






42. What selective Cox-2 inhibitor should be avoided in patients with a history of sulfonamide allergy?






43. What is the name for the following RBC indices? - The coefficient of variation of the RBC volume






44. What is the term for gastric ulcers associated with increased intracranial pressure?

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45. What AD disease is associated with chromosome 4p; does not present until the person is in his or her 30s; and involves atrophy of the caudate nucleus - dilatation of the lateral and third ventricles - and signs of extrapyramidal lesions?






46. What is the term for a complete aversion to all sexual contact?






47. What enzyme catalyzes the reversible oxidative deamination of glutamate and produces the TCA cycle intermediate a - ketoglutarate?






48. What neuroleptic agent causes agranulocytosis but does not induce tardive dyskinesia?






49. What form of bias is due to false estimates of survival rates?

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50. Do you monitor heparin's therapeutic levels by PT or PTT?