题目内容

13 different clotting factors must interact before blood ______(clots).

A. completmentes
B. suspends
C. coagulates
D. precipitates

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the two types of agranulocytes are

A. lymphocyte and phagocyte
B. lymphocyte and neutrophil
C. monocyte and macrophage
D. monocyte and lymphocyte

Platelets are important in the prevention of blood loss, a process termed _

A. homeostasis
B. hepotolysis
C. hemostasis
D. coagulation

______inhibit the ability of viruses to infect uninfected cells and stimulate macrophages to ingest bacteria.

A. Lymphoidkines
B. Cytokines
C. Immunogloblins
D. Interferons

_________activate T cells, called helper cells or T4 cells, which can stimulate antibody production.

A. Interferons
B. Interleukins
C. cytotoxic matters
D. fungi

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