The directional migration of leukocytes along a chemical gradient is termed:
a. chemotaxis.
b. endocytosis.
c. margination.
d. diapedesis.
ANS: A
Chemotaxis is the process by which leukocytes undergo directed migration. Endocytosis is a form of engulfment and a part of phagocytosis. Margination occurs when leukocytes adhere to endothelial cells in the walls of vessels. Diapedesis is the emigration of the cells through cell junctions that have loosened in response to inflammatory mediators.
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