What initiates T cell activation?
A)T cell activation begins when a T cell is ingested by a macrophage.
B)T cell activation begins when the T cell differentiates into effector cells and memory cells.
C)T cell activation begins with a dendritic cell processing and displaying antigen fragments on its MHC molecules.
D)T cell activation begins with the interaction of the T cell with other molecules on the cells called co-stimulators.

Question

Quizplus · Accepted Answer

T cell activation begins with a dendritic cell processing and displaying antigen fragments on its MHC molecules. This interaction between the T cell receptor and the MHC molecule, along with co-stimulatory molecules, initiates T cell activation. The other options are incorrect as T cell activation does not begin with the ingestion of a T cell by a macrophage or the differentiation of T cells into effector and memory cells. While co-stimulators are important for T cell activation, they are not the initial trigger.

What Initiates T Cell Activation