Question

Helps activate T cells, which are produced in bone marrow but mature in the thymus gland

HELLPP

Answer 1

peptide antigens by MHC class II molecules

Step-by-step explanation:

Helper T cells are activated by peptide antigens by MHC class II molecules. These antigens express on the surface of antigen-presenting cells (APCs). After activation, the T helper cells divide and secrete cytokines to assist the immune response.