A monocyte circulating in the blood:
a. Exits the blood to differentiate into a macrophage in connective tissue
b. Is approximately 10 micrometers in diameter
c. Is specialized for attacking and destroying parasitic larvae
d. Possesses a small, round, dark-staining nucleus
e. Possesses numerous, intensely stained secretion granules in the cytoplasm
ANS: A
Monocytes are large cells (20 micrometer diameter or more) and have a large, pale-staining nu-cleus and an extensive, clear cytoplasm. They differentiate into connective tissue macrophages.
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