There are multiple pathways that can be triggered by binding to the same target structure.

There are multiple pathways that once triggered lead to the same effector function.

There are multiple independent pathways that behave individually but result in a similar outcome.

It is highly specific and relies on learning and remembering past exposure to microbes.

Are quite varied and as a whole bind to a large range of different types of structures.

 Capitalise on the process that occurs within the endosome to expose defined structures.

Match those found on the cell surface to capture escaped microbes.

Are all identical because they bind nucleic acids.

The expansion of both CD4 and CD8 T cells is about equal to provide a targeted and specific response.

CD8 T cell expansion will outnumber CD4 T cell expansion due to the effector function of CTLs compared to T helper cells.

The pathogen epitopes that are presented to both the CD4 and CD8 T cells will be identical to enhance effector functions.

It is the role of the CD4 T cell once activated to then present antigen to naive CD8 T cells to drive activation and the generation of CTLs.

The driven by the increased association of adhesion molecules to maintain contact between T cells and dendritic cells

Is linked to the innate feature of the dendritic cells that involves Pattern recognition receptors and their recognition of pathogen structures.

Occurs once all the surface interactions between Dendritic cell and T cell have occurred and is indicating the activation of intracellular signal transduction pathways.

Refers specifically to the cytokines that are released by dendritic cells to drive the second aspect of activation which is differentiation to a T helper subset.

Immune synapse

Immune gathering

Immune grouping

Immune assembly