USMLE

A child who has had abnormal development of the membranous bones has a  broad skull with associated facial and dental anomalies. Which other bones   are most likely to also be affected?

A woodworker operating a bandsaw accidently injures his wrist, severing  his radial artery and producing severe hemorrhage. As he loses blood, his   body tries to compensate for the developing hypotension by increasing    sympathetic outflow. The postganglionic signals carrying the impulses     to constrict his arterioles are transmitted along which of the following      fiber types?

A 34-year-old woman presents with fatigue, malaise, and swollen, tender  joints. Physical examination is significant for a maculopapular eruption   over sun-exposed areas, including the face. Examination of a peripheral    blood smear reveals mild thrombocytopenia. Which of the following     autoantibodies, if present, would be most specific for the diagnosis      of the patient's disorder?

Histologic examination of normal skin demonstrates small numbers of  perivascular cells, with darkly stained ovoid nuclei and granular   cytoplasm on hematoxylin and eosin staining. The cells demonstrate    metachromasia of the cytoplasm when stained with Giemsa stain. Which of     the following products would these cells be most likely to secrete?

A 27-year-old white male presents with a 3-week history of several  swollen and painful toes and knees. He has a past history of  conjunctivitis. He also describes some low back stiffness that is   more severe in the morning. Which of the following is the most    likely diagnosis?

A 35-year-old woman notices a change in the appearance of a mole on her  neck. Physical examination reveals that the lesion is an irregular,  nodular, superficial mass with a variegated appearance. Biopsy demonstrates   a primary malignant tumor. Which of the following factors is most    predictive of the patient's long term prognosis?

Axons found around the area indicated by the arrow in the figure above are myelinated by

Which of the following respiratory system components is derived from  neural crest?

What percentage of patients with ischemic heart disease present with  sudden death?

Digoxin toxicity may be precipitated by hypercalcemia?