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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 most common one? - Liver tumor






2. From What embryonic structure are the following structures derived? - The sinus venarum - coronary sinus - and the oblique vein of the left atrium






3. What is the first epidermal layer without organelles and nuclei






4. Name the hepatitis virus based on the following information - Naked capsid RNA calicivirus






5. What lysosomal enzyme is deficient in x Tay- Sachs disease?






6. What enzyme found in a cholinergic synapse breaks down ACh? What are the byproducts?






7. What component of an ECG is associated with the following? - Atrial depolarization






8. What hormones - secreted in proportion to the size of the placenta - are an index of fetal well - being?






9. What statistical method do you use when analyzing x Cohort studies?






10. The inferior mesenteric artery drains into it.






11. If the P value is less than or equal to .05 - What do you do to the null hypothesis?






12. What complex of the ETC contains Cu2+?






13. What are the two best indices of left ventricular preload?






14. What are the two leading causes of cancer - related death in men?






15. What is the polarity (i.e. - 5'-3' or 3'-5') of a positive sense RNA?

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16. What modified smooth muscle cells of the kidney monitor BP in the afferent arteriole?






17. Where is the action potential generated on a neuron?






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






19. What is the name of the force that develops in the wall of the lungs as they expand?






20. What is the biochemical trigger for REM sleep?






21. In what form are triglycerides sent to adipose tissue from the liver?






22. What is the drug of choice for threadworm - trichinosis - and larva migrans?






23. What is the only anesthetic that causes cardiovascular stimulation?






24. What two pathologic conditions occur when the gut does not return to the embryo?






25. Which CNs are found in the midline of the brainstem?






26. What is the main factor determining GFR?






27. What organ is responsible for the elimination of excess nitrogen from the body?






28. What transports iron in the blood?






29. Match the chromosome and haploid number with the stage of sperm development - spermatid - spermatocyte (primary or secondary) - spermatogonia (type A or B): x 46/2n (divide mitotically)






30. What two vessels come together to form the external jugular vein?






31. What muscle or muscles are innervated by the following nerves? - Suprascapular nerve






32. Name the associated chromosome - Patau syndrome






33. Name the T- cell CD marker: Is a costimulatory molecule in T cell activation






34. Name the lung measurement based on the following descriptions: x Additional air that can be taken in after normal inspiration






35. What component of the ETC is inhibited by the following? - Rotenone






36. What is the MCC of the following meningitides? - In renal transplant patients






37. What type of error is made if you accept the null hypothesis when it is false?

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38. Based on the following information - is the renal transplantation rejection acute - chronic - or hyperacute? - Months to years after transplantation; gradual onset of HTN - oliguria - and azotemia; seen as intimal fibrosis of the blood vessels and in






39. What pattern of genetic transmission affects only M and has no M- to - M transmission - and mother is usually an unaffected carrier?






40. What judgment states that the decision - by rights of autonomy and privacy - belongs to the patient - but if the patient is incompetent to decide - the medical decision is based on subjective wishes?






41. What is the most common primary malignant tumor in bone?






42. All Proteus species are...






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






44. Name the antimicrobial agent whose major side effect is listed - Dental staining in children






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






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






47. What form of hemophilia is X- linked recessive and is due to a deficiency in factor IX?






48. Which Streptococcus pyogenes toxin is immunogenic?






49. Development of what T cell line follows low affinity for self - MHC class II Ags in the thymus?






50. What is the term for the point on a scale that divides the population into two equal parts?