Biochemicals known as cytokines serve to:

a. increase blood flow to the area of infec-tion and can also effectively wall off the infection through the production of barrier substances.
b. attract and enhance the activities of pha-gocytes.
c. have substantial effects on the activities of other cells.
d. directly kill gram-negative bacteria.


C
A key component of inflammation is the group of cytokines that are substances secreted by ma-crophages and other cells that enhance the antiinfective activities of other cells.

Biology & Microbiology

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