The activation of helper T cells is likely
A)when an antigen is displayed by a dendritic cell.
B)when a cytotoxic T cell releases cytokines.
C)when natural killer (NK)cells come in contact with a tumour cell.
D)in the bone marrow during the self-tolerance test.
E)when B cells respond to T-independent antigens.

Question

Quizplus · Accepted Answer

Helper T cells are activated when an antigen is displayed by a dendritic cell, which is one of the antigen-presenting cells in the immune system. The activation of helper T cells is a crucial step in the initiation of adaptive immune responses.

The Activation of Helper T Cells Is Likely