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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 nucleus supplies the preganglionic parasympathetic fibers to the ciliary ganglion?






2. What cell type is found in the peripheral white pulp of the spleen?






3. What syndrome is associated with the following brainstem lesions? - AICA or superior cerebellar artery occlusion - resulting in ipsilateral limb ataxia - ipsilateral facial pain and temperature loss - contralateral loss of pain and temperature to the






4. Which nicotinic receptor antagonist is inactivated to laudanosine?






5. In what disease is there a genetic absence of UDP- glucuronate transferase - resulting in an increase in free unconjugated bilirubin?






6. Why is the base of the lung hyperventilated when a person is standing upright?






7. What personality disorder affects 75% of the prison population?






8. What vascular injury may result from a supracondylar fracture of the femur?






9. What AR disease involves a defect in AA 508 on chromosome 7 - causing a defect in Cl - transportation that leads to recurrent pulmonary infections and an increase in viscid mucoid secretions along with pancreatic insufficiencies?






10. What percent of unwed mothers are teenagers?






11. What is the most common one? - Primary malignant tumor of the lungs






12. What toxicities are caused by the following agents? - Halothane






13. What is the most common one? - Thyroid adenoma






14. Patients with sickle cell anemia are at increased risk for infection From what type of organisms?






15. What is the most common one? - Type of melanoma






16. Name the six vitamin K- dependent coagulation factors.






17. What component of the corneal reflex is lost in a CN VII deficit?






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






19. What is the most common one? - Brain tumor






20. What Hgb - derived endogenous pigment is found in areas of hemorrhage or bruises?






21. Name the structure that enters or exits the following foramina: x Stylomastoid foramen






22. Name the phase of the eukaryotic cell cycle: x Period of DNA replication (preparing for mitosis)






23. What three bases are pyrimidines?






24. What cell surface modification of ependymal cells and respiratory epithelium has a 9 + 2 microtubular configuration and movement as its function?






25. In a topographical arrangement of the cerebellar homunculus map - What area or lobe x Controls balance and eye movements?






26. What phase of the cell cycle are the following antineoplastic agents specific for? - Dacarbazine






27. Which antihistamine is one of the DOCs for treatment of vertigo?






28. What enzyme is inhibited by disulfiram?






29. What glycogen storage disease is due to the following enzyme deficiencies? - Lysosomal glucosidase (acid maltase)

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30. With a decrease in arterial diastolic pressure - what happens to x Heart rate?






31. Which gram - negative diplococcus ferments maltose?






32. Name the compartment of the mediastinum associated with the following thoracic structures: IVC






33. Do not have MHC class I Ags on their surface.






34. Neurons in the dorsal horn participate in...






35. What is the term to describe basophils that have left the bloodstream and entered a tissue?






36. What cancer is particularly likely to affect English chimney sweeps?






37. What syndrome is characterized by embryologic failure of the third and fourth pharyngeal pouches resulting in hypocalcemia - tetany - and T- cell deficiency?






38. What negative sense RNA virus is associated with intracytoplasmic inclusion bodies called Negri bodies?






39. Induces the cytochrome P-450 enzymes.






40. Name the thalamic nucleus based on its input and output - Input from the amygdala - prefrontal cortex - and temporal lobe; output to the prefrontal lobe and the cingulated gyrus






41. When a drug is administered orally and enters into portal circulation - it undergoes hepatic metabolism. What is the name of this effect?






42. Is filtration greater than or less than excretion for net reabsorption to occur?






43. On the venous pressure curve - What do the following waves represent? - A wave?






44. What is the end product of purine catabolism?






45. What pharyngeal pouch and groove persist when a pharyngeal fistula is formed?






46. Prolactin levels can serve as a rough indicator of...






47. Name the lipoprotein based on the following characteristics - apo E - apo B-100 - apo C- II






48. What term describes how an action potential is propagated along an axon?






49. What phase of the cell cycle are the following antineoplastic agents specific for? - Vinblastine






50. Where do adult tapeworms develop - in the intermediate or definitive host?







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