What pool of cells is the first to arrive when extra granulocytes are needed in the tissues?
a. Those that are marginating
b. Those that are freely circulating
c. Those from the bone marrow
d. Those from the lymph nodes
ANS: A
Marginated granulocytes are granulocytes clinging to the sides of small venules. They freely exchange with granulocytes in the circulating pool but can readily move into tissue along a chemotactic gradient when needed.
Health Professions
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