Which class of chemical messenger facilitates white blood cell formation in bone marrow?

Upon activation, a T-lymphocyte

Which type of cell responds to multiple antigens?

The antigen-antibody reaction is an example of the regulation function of blood.

Which type of antigen would have the greatest immunogenicity?

Lymphatic organs

After maturation, T lymphocytes tend to remain in the same lymphatic structure for life.

Tonsils are secondary lymphatic structures.

When viewing a centrifuged blood sample, the erythrocytes will be on the top.

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