Question

Leukocyte movement from blood to the site of tissue damage or infection involves ________, leukocyte movement toward the blood vessel wall; ________, the movement of leukocytes between endothelial cells of the blood vessel; and ________, the movement within the tissue to the site of injury.

A) margination : diapedesis : chemotaxis
B) diapedesis : margination : chemotaxis
C) chemotaxis : diapedesis : margination
D) chemotaxis : margination : diapedesis
E) margination : chemotaxis : diapedesis

Answer 1

Leukocyte movement from blood to damaged or infected tissue involves margination, diapedesis, and then chemotaxis, in that order.

Step-by-step explanation:

The movement of leukocytes from the blood to the site of tissue damage or infection involves a series of steps. The correct sequence is margination, which is the movement of leukocytes toward the blood vessel wall; diapedesis, the process by which leukocytes squeeze through adjacent cells in the blood vessel wall to enter tissues; and chemotaxis, which is the movement within the tissue to the site of injury, guided by chemical signals emitted by injured or infected cells.

Thus, the correct answer to the question would be A) margination : diapedesis : chemotaxis.