Questions

During embryological development, hematopoiesis occurs in different organs  at different times. Which of the following are the correct organs, in the   correct sequence, at which hematopoiesis occurs embryologically?

An autopsy is performed on a man who suddenly began vomiting voluminous    quantities of blood and exsanguinated. Which of the following organisms is most     likely implicated in the pathogenesis of this disease?

A 25-year-old man presents with a chief complaint of persistent, high-pitched ringing noises in his ears. Questioning reveals that he has also been losing his balance lately. CT of the head demonstrates  bilateral tumors involving the vestibulocochlear nerve. Which of the  following chromosomes contains the tumor suppressor gene most likely to   be involved in this case?

A 37-year-old woman who was diagnosed with AIDS 3 years earlier is unable  to work, is physically debilitated, and requests her physician to provide   her with medications with which to take her own life. The most common    emotional disorder that results in such requests by patients is

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 65-year-old man with mild heart failure is treated with a loop diuretic . A few days later the man complains of muscle weakness. Laboratory results  are shown below.  Arterial PCO2: 48 mm Hg Arterial pH: 7.49   Plasma HCO3-: 35 mEq/L Which of the following is most likely    decreased in this man?

A 54-year-old male with acute lymphocytic leukemia develops a blast crisis.  He is treated with intensive systemic chemotherapy. Following treatment,   the patient will be at increased risk for the development of

Which of the following organisms is the most common cause of  community-acquired pneumonia?

A mutation affecting the development of the diencephalon could interfere  with the secretion of which of the following hormones?

A patient with familial hypercholesterolemia undergoes a detailed serum  lipid and lipoprotein analysis. Studies demonstrate elevated cholesterol   in the form of increased LDL without elevation of other lipids.    This patient's hyperlipidemia is best classified as which of the    following types?