Answer to Question 1
Ans:
C
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Kupffer cells are reticuloendothelial cells that are capable of removing and phagocytizing old and defective blood cells, bacteria, and other foreign material from the portal blood as it flows through the sinusoid. This phagocytic action removes enteric bacilli and other harmful substances that filter into the blood from the intestine. Small tubular channels in the liver secrete bile. The functional unit of the liver is lobule. Approximately 25 of blood per minute enters the liver through the hepatic artery.
Answer to Question 2
Ans:
C
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The oxidation of proteins provides 4 kcal/g; fats, 9 kcal/g; carbohydrates, 4 kcal/g; and alcohol, 7 kcal/g.