Which of the following statements regarding the secretions of immune system cells is TRUE?

A. Type 2 interferons are only secreted by macrophages.
B. Interleukin 2 is a cytokine secreted by most immune cells.
C. Type 1 interferons are also called interferon-gamma.
D. Colony-stimulating factors are secreted mainly by plasma cells.
E. Antibodies are produced and secreted by macrophages.


B

Anatomy & Physiology

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