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21. An endemic disease of cardiomyopathy in children is attributed to
A. low Se in the environment
B. low intake of iron
C. high Se in the environment
D. high intake of iron
22. Which of the following statement is correct?
A. Sodium and chloride are the chief extracellular ions of the body
B. Sodium and chloride are primarily involved in maintaining osmotic equilibrium and body fluid volume.
C. Chloride ion is necessary for the production of hydrochloric acid of gastric juice.
D. All of these
23. Which of the following is necessary for the clotting of blood, functions of certain enzymes and control of fluids through cell membranes?
A. Calcium
B. Magnesium
C. Copper
D. Cobalt
24. Selenium deficiency leads to
A. liver necrosis
B. diarrhea
C. multiple sclerosis
D. Crohn’s disease
25. Manganese is a key component of all of the following enzymes except
A. arginase
B. pyruvate carboxylase
C. ceruloplasmin
D. Mn-superoxide dismutase
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