Match the correct form of adaptive immunity to the scenarios below.

A.   Cell-Mediated Immunity.         B.   Humoral Immunity

_____   1. A macrophage acting as an APC is activated by a CD4 effector cell.

_____   2. A naive B cell is activated after binding an antigen and differentiates into a plasma cell. 

_____   3. Responds to exogenous antigens. 

_____   4. Responds to endogenous antigens.

_____   5. A liver cell infected with a virus undergoes apoptosis when signaled by a CD8 effector cell.