contestada

What is the role of helper T cells in the adaptive immune response? a) Helper T cells directly kill infected host cells. b) Helper T cells produce and secrete antibodies. c) Helper T cells activate B cells and cytotoxic T lymphocytes to kill infected host cells. d) Helper T cells phagocytize bacteria and viruses.

Respuesta :

Answer:

c) Helper T cells activate B cells and cytotoxic T lymphocytes to kill infected host cells.

Explanation:

T helper cells are also known as CD4 cells since they have a surface glycoprotein CD4 present at their surfaces. Helper T cells serve as regulatory cells as they secrete cytokines to activate B cells, cytotoxic T cells, and macrophages.

Antigen present cells activate the helper T cells and the activated helper T cells activate other immune cells. For instance, interleukin-2 and other cytokines secreted by activated helper T cells serve as costimulators and activate B cells which in turn undergo clonal selection to produce specific antibodies against a specific antigen.