Question

multiple choice question proteins or peptides secreted by various immune cells that function as chemical mediators by binding to cells and enhancing cellular responses to antigens as well as stimulating proliferation and differentiation of cells are called ________.
o cytokines
o neurotransmitters
o hormones

Explanation:

Cytokines are proteins or peptides secreted by immune - cells that act as chemical mediators, binding to cells and enhancing responses to antigens and stimulating cell proliferation and differentiation. Neurotransmitters are involved in neural communication, and hormones are secreted by endocrine glands and act on distant target cells.

Answer:

A. cytokines