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A 37-year old female presents to the clinic complaining of severe pain in her left wrist and tingling sensation in her left thumb, index finger, and middle finger, and some part of her ring finger. The pain started as an occasional throb and she could ignore it or take ibuprofen but now the pain is much worse and wakes her up at night. She works as a typist and her pain mostly increases after typing all day. Her right wrist and fingers are fine. Nerve conduction studies reveal nerve compression. Which of the following nerves is most likely compressed in this patient?
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A 25-year-old male visits his family physician for a 5-day history of fever and fatigue. Upon further questioning, he says that he also had constant muscular pain and headaches. He adds additional information by giving a history of regular unprotected sexual relationship with multiple partners. He is a non-smoker and drinks alcohol occasionally. Vital signs: heart rate --- 98/min., respiratory rate --- 16/min., temperature --- 38°C and blood pressure --- 120/80 mm Hg. On physical examination, he is icteric and hepatosplenomegaly is evident with abdominal tenderness particularly in the right upper quadrant. The serologic markers show the following pattern: IgM anti-HBc positive, HBsAg positive. Which of the following is the most likely diagnosis?
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During surgical intervention, an organ is removed from a 34-year-old patient and sent for histologic evaluation. The pathologist examines the slide. The organ is encased in a connective tissue capsule that extends septae into the organ's substance, which is portioned into cortex and medulla. It is richly vascularized and capsular blood vessels penetrate along with the septae. The medulla is fairly homogenous and consists of chromaffin cells, but in the cortex, three concentric zones can be distinguished. Which of the following is the most likely organ?
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One of the tunics of a hollow organ contains nucleated anastomosing fibers. The fibers consist of cells that form intercalated discs in the contact areas. What tissue forms this tunic of an organ?
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An unidentified surgical specimen is received for histopathologic analysis. A portion of the specimen is cut and stained with hematoxylin and eosin. Under the microscope, you see an organ encapsulated by dense connective tissue that extends to the deeper areas by way of the trabecular extensions. The organ can be subdivided into two regions: a cortex with lymphoid nodules and medulla with medullary cords populated by plasma cells, B-cells and T-cells. Which of the following structures is most likely the origin of this surgical specimen?
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A group of researchers aimed to study cardiac physiology found that overstretching of atria in the heart leads to decreased sodium reabsorption in the distal convoluted tubule and increase in glomerular filtration rate. Which of the following is the most likely cause of physiologic effects discovered by researchers?
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Two weeks ago, an illness was reported in several children at the orphanage. Based on the description of its clinical manifestations and epidemiological data, the epidemiologist suspects an outbreak of measles infection. What type of laboratory analysis can confirm this provisional diagnosis?
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Infectious diseases are treated with antibiotics (streptomycin, erythromycin, chloramphenicol). They inhibit the following stage of protein synthesis:
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Які механізми регуляції зумовлюють збільшення частоти серцевих скорочень під час зміни положення тіла з горизонтального у вертикалене?
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It has been found out that one of a pesticide components is sodium arsenate that blocks lipoic acid. Which enzyme activity is impaired by this pesticide?
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